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2009-07-12: PrimeGrid - New AP24 Found

PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Bryan Little (mfl0p) of the United States. He is a member of the [H]ard|OCP team. The progression is written as 7979661543967237+9936237*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-07-10: PrimeGrid - Record AP24 Found

PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the AP24 with smallest known start. It has a starting term of 39421708111691 decreasing the old record of 167806194923077. The finder is Mark Codding (Narwhal) of the United States. He is a member of Team Picard. The progression is written as 39421708111691+9740894*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-07-06: PrimeGrid - New AP24 Found

PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is PaweÅ FeruÅ (mindc) of Poland. He is a member of the BOINC@Poland team. The progression is written as 5531900872160491+9383796*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-07-04: PrimeGrid - Record AP24 Found

PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 60739320360456407 surpassing the old record of 60312982868878297. The finder is Carsten Hartwig (SG Arsenic) of the United Kingdom. He is a member of the SETI.Germany team. The progression is written as 13432401425380607+9219580*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-07-01: PrimeGrid - AP26 application available for Solaris

We have released a version of AP26 application for 64bit Solaris (on AMD x86_64 or Intel EM64T CPUs, platform name x86_64-pc-solaris). This is our first application for this platform, which also makes AP26 an application that runs on the most platforms. Thanks to Gerrit Slomma for building the app! Psst... the PS3 version is coming ;)

2009-06-30: PrimeGrid - Record AP24 Found

PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 60312982868878297 surpassing the old record of 25490711550130537. The finder is (AFXTBA Pitheque) of France. He is a member of the L'Alliance Francophone team. The progression is written as 14992521666441877+8832442*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-06-20: PrimeGrid - New Top Host!

Congratulations to Worldwide Center of Mathematics, owner of the new top host at PrimeGrid. While this position has changed many times in the past, what makes this occasion unique is that this is the first time the top host is a Mac!!!EDIT: The above is in terms of RAC. In terms of total credit, UL1 holds a commanding lead of over 5M cobblestones with this host.

2009-06-15: PrimeGrid - The sieves have been Mac'd out!

321, PPS, and PSP sieves now have application support for Mac OS X 10.4 running on Intel and 10.5 running on 64bit Intel. PPS sieve also offers application support for Mac OS X 10.3 running on PPC.

2009-06-13: PrimeGrid - GIMPS does it again!!!

Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! On April 12th, Odd Magnar Strindmo of Norway discovered the 47th known Mersenne prime, 2^42,643,801-1. It is the second largest known prime at 12,837,064 digits, only 141,125 digits smaller than the Mersenne prime found last August. The prime was independently verified June 12th.For more information, please visit the GIMPS site. Again, congratulations!!!

2009-06-11: PrimeGrid - PrimeGrid's Birthday/Summer Solstice Challenge

Just over 24 hours until the start of PrimeGrid's "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. Long Challenge, long WU's, but the rewards are greater...250 Challenge points goes to the winner and should a prime be found, it will be a Mega Prime.For more information, please see this forum post.

2009-06-07: PrimeGrid - PrimeGrid's Birthday/Summer Solstice Challenge

PrimeGridâs Challenge series continues with the "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. We are celebrating PrimeGrid's 4th birthday on 12 June...culminating 21 June on the Summer Solstice. It seems fitting that the sun will shine the longest for the project with the longest WU.For more information, please see this forum post.

2009-05-29: PrimeGrid - Record APs Found

PrimeGrid has found two new records for AP22 and AP23 (Arithmetic Progression of 22 primes and 23 primes respectively). They are the smallest known starts for each of their classifications.The finders are Jacek Kotnowski (sosnahojna - team BOINC@Poland) of Poland for the AP22 record and Eric Markle (Nikodemus - team BOINCstats) of the United States for the AP23 record. They were found in the AP26 Search. For more details on these finds and the AP26 search, please see these forum posts - AP22, AP23.

2009-05-20: PrimeGrid - 1,000,000,000 cobblestones for PrimeGrid!!!

Today, PrimeGrid surpasses the 1 Billion mark in cobblestones. From meager beginnings on 12 June 2005 to now, a tremendous amount of work has been accomplished...6 mega primes, 3 Fermat Number divisors, and over 4000 titanic primes have been discovered. Congratulation goes out to the entire community for an incredible achievement. Thank you all for your support!

2009-05-17: PrimeGrid - Scheduled downtime

We are going to have a one to two hour downtime tomorrow, May 18, at about 12:00 GMT, because the servers have to be moved to a different rack as the datacenter is upgrading their infrastructure.

2009-05-15: PrimeGrid - New Points Leader

Congratulations to SG Grid, for becoming the new points leader at PrimeGrid. What makes this accomplishment more amazing is that it was done in less than 5 months. The two projects that have benefited the most from this achievement are the Twin Prime Search and the Prime Sierpinski Problem. Again, congratulations!

2009-05-13: PrimeGrid - PrimeGrid mentioned at TEDx talk

Watch a TEDx Warwick talk by Francois Grey about citizen cyberscience, which also mentions PrimeGrid (at about 8:20) or download the video (215MB). $f("player", "/flowplayer/flowplayer-3.1.0.swf", { clip: { url: '/download/TEDx/francois_grey.flv', autoPlay: false } });

2009-05-11: PrimeGrid - Mac OS X support!

We have released first PrimeGrid application for Mac OS X, Arithmetic Progression of 26 Primes Search (AP26). Mac OS X 10.3 running on PPC, 10.4 running on Intel and 64bit 10.5 running on Intel are supported. Thanks to Iain Bethune for compiling the apps.

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2009-05-06: PrimeGrid - Record AP24 Found

PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24 as well as the AP24 with smallest known start.The finder is Andreas Kobara (Lexs) of Germany. He is a member of the Gentoo Linux Users Everywhere team. The progression is written as 167806194923077+4935146*23#*n for n=0..23.It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post.

2009-05-05: PrimeGrid - 50M Cobblestones

Congratulations to L'Alliance Francophone, for reaching the 50M cobblestones level at PrimeGrid. They are only the second team to accomplish this. It actually occurred during the Showers to Flowers Challenge so this is a bit belated. Again, congratulations!

2009-05-02: PrimeGrid - The Showers to Flowers Challenge

The results are final. Over 1169T was crunched in the 48 hours of the Challenge and over 389,000 tasks were completed by 260 teams and 2092 individuals. Congratulations to SETI.Germany as the top team and [AF>XTBA>XTC] FRED as the top individual.Many thanks goes out to everyone who participated!!! For more stats and information, please see this forum post.

2009-04-29: PrimeGrid - The Showers to Flowers Challenge

Let the "rains" begin!!! The Showers to Flowers Challenge has started. A 2 day (48 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. For more information, please see this forum post.

2009-04-28: PrimeGrid - The Showers to Flowers Challenge

Only 24 hours remain until it starts "raining" factors. A 2 day (48 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. Come join us for a shower of factors in hopes to make those hidden primes bloom. :) For more information, please see this forum post.

2009-04-21: PrimeGrid - World Record Cullen Mega Prime found

On 20 Apr 2009 0:52:45 UTC, PrimeGrid's Cullen Prime Search found a World Record Cullen Mega Prime: 6328548*26328548+1The prime is PrimeGrid's largest prime to date. It is 1,905,090 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th overall. It is the largest Cullen prime found and the largest found Mega Prime using LLR.The discovery was made by Dennis R. Gesker (Gesker) of the United States using an Intel Xeon E5420 @ 2.50GHz with 8GB RAM running Windows Server 2008. This computer took 32 hours 28 minutes to complete the primality test.For more details, please see the official announcement. Decimal representation of the number is also available.

2009-04-20: PrimeGrid - World Record Cullen Mega Prime found

A PrimeGrid participant has discovered a World Record Cullen Mega Prime in the Cullen Prime Search. This is a very special and rare find. It is only the 15th Cullen prime known. It is also a top 15 prime and the largest found by LLR. Additionally, it is PrimeGrid's largest prime to date. Stay tuned for more details.

2009-04-09: PrimeGrid - Record AP25 Found

PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid's first AP25 and only the second known. It is the largest AP25 having an ending term of 15523154536267043 surpassing the old record of 8132758706802551. It is also the AP25 with smallest known start 2960886048458003, the previous record being 6171054912832631.The finder is BOINC@Poland's "Super Computer" (SKB@P). It is a farm of machines funded by BOINC@Poland members. The progression is written as 2960886048458003+2346233*23#*n for n=0..24. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-04-07: PrimeGrid - Record AP24 Found

PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 19898154930924749 surpassing the old record of 19516877252820799. The finder is Pawel Stachowiak (stachu @ fiddex) of Poland. The progression is written as 7960592659339799+2326495*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

2009-04-05: PrimeGrid - New AP24 Found

PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Pawel Stachowiak (stachu @ fiddex) of Poland. The progression is written as 6274259724784693+2522655*23#*n for n=0..23. It was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26.For more details on this find and the AP26 search, please see this forum post.

2009-04-05: PrimeGrid - 321 Prime Search finds a Mega Prime

On 3 Apr 2009 15:40:01 UTC, PrimeGrid's 321 Prime Search found another Mega Prime:3*25082306+1The prime is 1,529,928 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th overall. It is the 6th largest Proth prime found and the largest found Mega Prime using LLR.The discovery was made by Andy Brady (Andy Brady) of the United States using an Intel C2Q Q8200 @ 2.33GHz with 3GB RAM running Windows Vista. This computer took about 14 hours 7 minutes to complete the primality test. Andy is a member of the BOINCstats team.For more details, please see the official announcement. Decimal representation of the number is also available.

2009-04-04: PrimeGrid - 321 Prime Search finds a Mega Prime

A PrimeGrid participant has discovered a Mega Prime in the 321 Prime Search! We are currently GFN divisibility testing the prime as well as awaiting contact with the discoverer. It is a top 15 prime and the largest found by LLR. Stay tuned for more details.

2009-04-02: PrimeGrid - Fermat Number Divisor

Congratulations to Eric Embling (Eric E) of the United States, the discoverer of PrimeGrid's third Fermat Number divisor in the Proth Prime Search project: 659*2^617815+1 Divides F(617813). It is the 3rd found Fermat Number divisor of 2009 and 273rd overall. It is the 6th largest Fermat Number divisor in Chris Caldwell's The Largest Known Primes Database. Incidentally, it is a new record for "weighted" Fermat Number divisors.For more information, please see this forum post.

2009-03-28: PrimeGrid - New AP24 Found

PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Krzysztof Koczubik (ksysju) of Poland. This is his second AP24 discovery. The progression is written as 6872932294461509+2042703*23#*n for n=0..23. It was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26.For more details on this find and the AP26 search, please see this forum post.

2009-03-20: PrimeGrid - The Ides of March Challenge

The results are final. Over 550,000 tasks were completed by 148 teams and 901 individuals. Congratulations to BOINCstats as the top team and j2satx as the top individual.Many thanks goes out to everyone who participated!!! For more stats and information, please see this forum post.

2009-03-16: PrimeGrid - The Ides of March Challenge

The photo finish is in and it looks pretty clear that BOINCstats has taken the team standings and j2satx the individual standings (unofficial). What an incredible past 24 hours. Job well done everyone!!! Congratulations all around.As for the fate of the primes, you can still hear their sorrowful moans as they are hauled off to the Top 5000 list. More details to come.

2009-03-16: PrimeGrid - The Ides of March Challenge

Just under 1 & 1/2 hours remain. So far, a week's worth of primes have been found in less than 24 hours...with more still coming in. The team and individual competitions are still battling it out. A photo finish seems inevitable.Now is the time to start preparing for the conclusion. Update your clients early and update often. For more information, please see this forum post.

2009-03-16: PrimeGrid - The Ides of March Challenge

8 hours into the Challenge and the primes are beginning to fall. The start went exceptionally well with over 40K tasks going out in 30 minutes (11630 tasks in the first 5 minutes)!!! Well done everyone.The team and individual competitions are heating up with fierce battles going on for the top spots. Looks like it's shaping up for another "down to the wire" finish. For more information, please see this forum post.

2009-03-15: PrimeGrid - The Ides of March Challenge

T-minus 18 hours and counting. The sievers have the primes on the run. The Ides of March approaches and doom is in the air for these primes. Come join us for a 24 hour Challenge on the Proth Prime Search LLR project. For more information, please see this forum post.

2009-03-14: PrimeGrid - GCW13 Mini-Challenge

Friday the 13th has come and gone. Sadly, those elusive and unique GCW13 primes continue to elude us. Looks like Friday, November the 13th will get its chance at finding them.However, the results will be much different in just over a day and a half from now for The Ides of March Challenge. The question isn't will a prime be found...it's how many. In a tribute to the sievers, come join us for a 24 hour Challenge on the Proth Prime Search LLR project. For more information, please see this forum post.

2009-03-13: PrimeGrid - GCW13 Mini-Challenge

Friday, March the 13th is HERE!!! And still no sighting of the elusive Generalized Cullen or Woodall base 13 primes. Will today be the day, or will we have to wait until Friday, November the 13th? Come join for a final push today. For more information, please see this forum post.

2009-03-09: PrimeGrid - GCW13 Mini-Challenge

Friday, March the 13th, is approaching which means it's time for another "friendly" mini-challenge to find a Generalized Cullen or Woodall base 13 prime. As we discovered last time, this is no easy task. With St. Patrick's day around the corner, we'll need a little bit of that Irish Luck to come early. :) For more information, please see this forum post.

2009-03-07: PrimeGrid - Fermat Number Divisor

Congratulations to Senji Yamashita (s-yama) of Japan, the discoverer of PrimeGrid's second Fermat Number divisor in the Proth Prime Search project: 519*2^567235+1 Divides Fermat F(567233). It is only the 2nd found Fermat Number divisor of 2009 and 272nd overall. It is the 7th largest Fermat Number divisor in Chris Caldwell's The Largest Known Primes Database. Incidentally, it is a new record for "weighted" Fermat Number divisors.For more information, please see this forum post.

2009-03-06: PrimeGrid - New AP24 Found

PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Stefan Smietanowski (Blast) of Sweden. The progression is written as 2725131905640097+1342336*23#*n for n=0..23. This was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26.For more details on this find and the AP26 search, please see this forum post.

2009-03-05: PrimeGrid - The Ides of March Challenge

The countdown has started, T minus 10 days and counting. The sievers are hard at work behind the scenes factoring out all the prime wannabe's. Doomsday is approaching the remaining candidates as there is little room left to hide. Come 15 March, GLORY will go to the finders and the primes will face their nemesis, the Top 5000 List at the Prime Pages. Be sure to catch some of that GLORY in the 24 hour Ides of March Challenge. For more information, please see this forum post.

2009-03-03: PrimeGrid - Statically-linked LLR wrapper

The new LLR wrapper that was released two weeks ago has now been updated to be fully statically-linked. Testing has gone well in the Proth Prime Search project. Therefore, it has been released for all LLR projects which include 321 Prime Search, Cullen Prime Search, Prime Sierpinski Problem, Twin Prime Search, and the Woodall Prime Search. 32 bit Linux support continues on ALL LLR projects.Again, thanks to Geoff Reynolds who has made this build a reality!

2009-03-03: PrimeGrid - Statically-linked LLR wrapper

2009-03-02: PrimeGrid - BEWARE the Ides of March!!!

If you are a prime, BEWARE the Ides of March!!! Right now, 100's of sievers are working behind the scenes to clear the path for the primality testers to find you. And on 15 March, your time is up!!! A 24 hour Challenge is being offered on PrimeGrid's Proth Prime Search (LLR) application. For more information, please see this forum post.

2009-03-02: PrimeGrid - BEWARE the Ides of March!!!

2009-03-01: PrimeGrid - Tour de Primes 2009 has ended!!!

There were no surprise sprints on this last day...just a nice champagne stroll around the Champs-ElysÃÂ©es. Congratulations to the jersey winners: Yellow - Lennart; Green - s-yama; and Checkered - Lennart.For more details on the conclusion of the race, please see this forum post.

2009-03-01: PrimeGrid - Tour de Primes 2009 has ended!!!

2009-02-26: PrimeGrid - New AP24 Found

PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Krzysztof Koczubik of Poland. He is a member of BOINC@Poland. The progression is written as 13785500104035967+1004314*23#*n for n=0..23. This was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of a record AP26.For more details on this find and the AP26 search, please see this forum post.

2009-02-26: PrimeGrid - New AP24 Found

2009-02-19: PrimeGrid - 321 Sieve

The 321 Sieve has completed its manual effort and is now available in BOINC. Current depth is p=2P for 5M < n < 25M. This is for both +1 and -1 forms. To participate, go to your PrimeGrid preferencesand select 321 Prime Search (Sieve). It's currently available for Linux64 and Windows32/64.

2009-02-19: PrimeGrid - 321 Sieve

2009-02-18: PrimeGrid - Tour de Primes 2009

Over half way through the Tour de Primes and Lennart continues to hold a comfortable lead. A quick look at his primes and you can see that he's taking advantage of PPSE on PRPNet. With the mountain stage coming up on the 23rd, it's not too late to reel him back in.For more information, please see Tour de Primes 2009. For information about PRPNet, please see this forum post.

2009-02-18: PrimeGrid - Tour de Primes 2009

2009-02-17: PrimeGrid - New LLR Wrapper for Linux

A new LLR wrapper for Linux has been released. Along with this release, there is now Linux support for the Cullen Prime Search (LLR) and Prime Sierpinski Problem (LLR). A special thanks to Geoff Reynolds, who made this build a reality!For more information, please see this forum post.

2009-02-17: PrimeGrid - New LLR Wrapper for Linux

2009-02-14: PrimeGrid - 12121 Prime Search

We are happy to announce that PrimeGrid is partnering with 12121 Search. Similar to 321 Search (k=3), 12121 Search is searching for single k primes of the form 121*2^n-1. They have been successfully searching since 2004 and are now in the Mega Prime area. For more details on the new search, please see this forum thread.

2009-02-14: PrimeGrid - 12121 Prime Search

2009-02-10: PrimeGrid - Prime Month

The prime month competition is starting to heat up. Lennart has just recently broken away from the group and has a 3 prime lead. He has a mixture of BOINC and PRPNet primes. Is there anyone who can challenge him for the yellow jersey??? Just under 2/3's of the month remains so there's plenty of time for someone to rein him back into the peloton.For more information, please see this forum post.

2009-02-10: PrimeGrid - Prime Month

2009-02-09: PrimeGrid - GCW13 Mini-Challenge

PrimeGrid user rogue has proposed a "friendly" mini-challenge to find a Generalized Cullen or Woodall base 13 prime on or before Friday, February 13th, 2009. A most ambitious endeavor! It will take the Luck of all the Irish PrimeGrid users for this prime to be found...especially on that date. However, to the finder goes all the spoils of fame (math fame) for these elusive gems! For more information, please see this forum thread.

2009-02-09: PrimeGrid - GCW13 Mini-Challenge

2009-02-08: PrimeGrid - 50M Cobblestones

Congratulations to SETI.Germany, the first team to reach 50M cobblestones at PrimeGrid. Also, a special thanks to pschoefer, SETI.Germany's administrator at PrimeGrid, who does an excellent job managing PrimeGrid's information for such a large team. Now the race is on for 100M cobblestones...can it be reached by year's end??? and by which team??? :)

2009-02-08: PrimeGrid - 50M Cobblestones

2009-01-31: PrimeGrid - The Year of the Ox Challenge

While the Challenge is over, the Year of the Ox is just beginning. Over 18,000 321 WU's were completed by 133 teams and 589 individuals. Congratulations to BOINCstats as the top team and WilliamWallace as the top individual.It was a GREAT start to the 2009 Challenge Series. Congratulations to everyone and thank you for participating!!! For more information, please see this forum post.

2009-01-31: PrimeGrid - The Year of the Ox Challenge

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2009-01-27: PrimeGrid - The Year of the Ox Challenge

24 hours into the Year of the Ox Challenge and all is well. In just this short time, BOINCstats has taken a commanding lead while the individual competition is a bit closer. It's not too late to join the fireworks in a celebration of the Chinese New Year.For more information, please see this forum thread.

2009-01-27: PrimeGrid - The Year of the Ox Challenge

2009-01-25: PrimeGrid - The Year of the Ox Challenge

Just over 24 hours remain until the Year of the Ox Challenge. Come join the fireworks in a celebration of the Chinese New Year, the Year of the Ox. A 5 day (26th-31st Jan) Challenge is scheduled on PrimeGrid's 321 Prime Search LLR application.For more information, please see this forum thread.

2009-01-25: PrimeGrid - The Year of the Ox Challenge

2009-01-20: PrimeGrid - The Year of the Ox Challenge

PrimeGrid's 2009 Challenge Series starts off with a fire cracker bang! Please come join us in the Chinese New Year, the Year of the Ox, for a 5 day (120 hour - 26th-31st Jan) Challenge on PrimeGrid's 321 Prime Search (LLR) application.The Ox is the sign of prosperity through fortitude and hard work. It is unswervingly patient, tireless in its work, and capable of enduring any amount of hardship without complaint. Sounds a lot like prime searchers. :)For more information, please see this forum thread.

2009-01-20: PrimeGrid - The Year of the Ox Challenge

2009-01-16: PrimeGrid - Norton Antivirus alarms

We are seeing multiple workunit failures and trouble reports because of Symantec (Norton) antivirus marking our screensaver as a probable virus. While there is nothing we can do about it, you can exclude BOINC data directory from antivirus path, and contact Symantec telling them about the false positive. Please keep all discussions in this forum thread.

2009-01-16: PrimeGrid - Norton Antivirus alarms

2009-01-01: PrimeGrid - First prime of 2009

Congratulations to zed, the discoverer of PrimeGrid's first prime for 2009 in the Proth Prime Search project: 15*2^483098+1. Unfortunately, it was just a double check. The first "new" prime of 2009 was found by Vato, again from the Proth Prime Search project: 835*2^483718+1.

2009-01-01: PrimeGrid - First prime of 2009

2008-12-28: PrimeGrid - Fermat Divisor

Congratulations to Eric Ueda, the discoverer of PrimeGrid's first Fermat divisor in the Proth Prime Search project: 651*2^476632+1 Divides F(476624). It is only the 6th found Fermat divisor of 2008 and 270th overall. It is the 8th largest Fermat divisor in Chris Caldwell's The Largest Known Primes Database. For more information, please see this forum thread.

2008-12-27: PrimeGrid - AP26 Search

PrimeGrid has added a new prime search project, an Arithmetic Progression of 26 primes. An arithmetic progression of primes is a sequence of primes with a common difference between any two successive numbers in the sequence. For example 3, 7, 11 is an arithmetic progression of 3 primes with a common difference of 4.To participate, go to your PrimeGrid preferences page and select AP26 (currently only available for 64 bit Linux). For more information, please see this forum thread.

2008-12-26: PrimeGrid - Primorial Prime Search

PrimeGrid has added a new prime search project, the Primorial Prime Search. These primes are of the forms p#+1 and p#-1. It enters the Project Staging Area first as a manual sieving effort. Once sufficient depth has been reached, a primality testing effort will begin.For more information, please see this forum thread.

2008-12-24: PrimeGrid - 2008 Challenge Series

PrimeGrid's 2008 Challenge Series has concluded. Congratulations to SETI.Germany as the top team and lennart SM5YMT as the top individual. They are the winners to PrimeGrid's inaugural 2008 Challenge Series. For a list of other top finishers, please see this forum thread.

2008-12-24: PrimeGrid - The Winter Solstice Challenge

The results are in for the Winter Solstice Challenge. Thank you for your patience. The margin of victory is 0.055%. Congratulations to WilliamWallace as the top individual and BOINCstats as the top team. For more information, please see this forum thread. The crowning of the top overall finishers in PrimeGrid's 2008 Challenge Series is next.

2008-12-22: PrimeGrid - The Winter Solstice Challenge

The Solstice has come and gone. Twas a tough last 12 hours but we have survived the night and the sun has risen again! The Winter Solstice Challenge ended with a tremendous battle. It's still too close to call. Thank you to all who participated in what turned out to be PrimeGrid's top Challenge of the Year. It would not have been possible without your support.For more information, please see this forum thread. Stay tuned...final results will be coming soon.

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2008-12-21: PrimeGrid - The Winter Solstice Challenge

'tis but 12 hours left till the Solstice. The fire is burning bright and there's plenty of logs to keep it alit til the sun's return at dawn. :) The team and individual races are as tight as ever. It looks like this will go down to the wire. :) Thank you everyone for making this the most exciting Challenge yet.For more information, please see this forum thread.

2008-12-20: PrimeGrid - The Winter Solstice Challenge

Only 24 hours remain until the Winter Solstice...the longest night/shortest day of the year. Although we are in the middle of winter in the northern hemisphere, the competition remains very hot...not to mention the heat coming off the cores. :) This is by far the most highly contested Challenge of the year. Most fitting for the finale in the 2008 Challenge series.For more information, please see this forum thread.

2008-12-18: PrimeGrid - The Winter Solstice Challenge

Over 24 hours into the 4 day (96 hour) Challenge and all is well. Everything is going quite smooth right now. Another record breaking amount of work is being completed. There are some close races in both the team and individual categories. It's not too late to join in and give your favorite team a boost. :)For more information, please see this forum thread.

2008-12-16: PrimeGrid - The Winter Solstice Challenge

Less than 24 hours remain till the Winter Solstice Challenge. Come join us in a 4 day (96 hour) Challenge on PrimeGrid's Prime Sierpinski Project (Sieve) application. Please consider running a few PSP (Sieve) WU's before the Challenge begins so your client will already have the sieve file. This way, during the Challenge, bandwidth can be used to deliver WU's instead of the sieve file. :) Thank you!For more information, please see this forum thread.

2008-12-10: PrimeGrid - The Winter Solstice Challenge

PrimeGrid's Challenge series for 2008 ends with the Winter Solstice Challenge. Please come join us in observing Nature's ending/beginning of a cycle. A 4 day (96 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. For more information, please see this forum thread.

2008-11-28: PrimeGrid - The Prime Time Challenge (Reloaded)

Four and a half hours into the Prime Time Challenge (Reloaded) and all is well. After a few minor bumps at the start, everything seems to be going smoothly. Most definitely this is the highest activity PrimeGrid has ever seen. :) Finally a good initiation for the new server.Thank you to everyone participating. Now let's find some primes!!! For more information, please see this forum thread.

2008-11-28: PrimeGrid - The Prime Time Challenge (Reloaded)

2008-11-27: PrimeGrid - The Prime Time Challenge (Reloaded)

The pre-stress on the server to the Prime Time Challenge (Reloaded) has shown a substantial improvement. A few more adjustments should make things even better. Therefore, the Challenge is on for 28 Nov - 30 Nov. More information can be found in this forum thread.

2008-11-27: PrimeGrid - The Prime Time Challenge (Reloaded)

2008-11-26: PrimeGrid - The Proth Prime Search

The first new "reportable" primes have started to trickle in. Congratulations to Kai Strang for finding the first one 825*2^373331+1...just in time for the Prime Time Challenge (28 Nov - 30 Nov). Come join the Challenge and find a prime for yourself. For more information, please see this forum thread.

2008-11-26: PrimeGrid - The Proth Prime Search

2008-11-24: PrimeGrid - The Prime Time Challenge (Reloaded)

The Prime Time Challenge has been rescheduled for 28 Nov - 30 Nov. We would like to pre-stress the server on 27 Nov at 17:00 UTC. For more information, please see this forum thread.

2008-11-24: PrimeGrid - The Prime Time Challenge (Reloaded)

The Prime Time Challenge has been rescheduled for 28 Nov - 30 Nov. We would like to pre-stress the server on 27 Nov at 17:00 UTC. For more information, please see this forum thread.

2008-11-15: PrimeGrid - The Prime Time Challenge

While the Challenge has been canceled (will be rescheduled) we will continue keeping stats for the current dates (14-16 November). The reason for this is that we want to continue to stress the server so we can see the impact on different server related issues. This will help us better prepare for the Prime Time Challenge (Reloaded). :)For those who are interested, please continue to crunch Proth Prime Search LLR through 16 Nov 2008 18:00 UTC. The results will be unofficial but the process will help us greatly. Thanks for the consideration and again, we apologize for the cancellation.

2008-11-15: PrimeGrid - The Prime Time Challenge

2008-11-14: PrimeGrid - The Prime Time Challenge

The Prime Time Challenge has been canceled. While the server is fine, we are having issues that we are not yet able to resolve. We sincerely apologize for this. More information to come when we have it.

2008-11-14: PrimeGrid - The Prime Time Challenge

2008-11-13: PrimeGrid - The Prime Time Challenge

Less than 24 hours remain until the Prime Time Challenge (14-16 November 2008). The initiation process is already warming up as the load increases on the Proth Prime Search (LLR) in advance of the start. We are approaching the "reportable" level in Chris Caldwell's The Largest Known Primes Database! Come help us reach it and find a prime for yourself.For more information, please see this forum thread.

2008-11-13: PrimeGrid - The Prime Time Challenge

2008-11-09: PrimeGrid - The Prime Time Challenge

Less than a week remains until the 48hr Prime Time Challenge (14-16 November 2008). Come help us initiate the new server and maybe find a prime large enough to enter into Chris Caldwell's The Largest Known Primes Database! The Challenge will highlight PrimeGrid's newest project, the Proth Prime Search. For more information, please see this forum thread.

2008-11-09: PrimeGrid - The Prime Time Challenge

2008-11-01: PrimeGrid - Preparing for the Prime Time Challenge

The key to an effective prime search is having a good sieve file. For the past several months, our primary focus has been on getting the PPS Sieve deep enough to start LLRing. While we have made great strides in this effort, we still need more help. Leading up to this Challenge, anyone with a 64 bit multiple core system is encouraged to join the Proth Prime Search sieving effort. Please see this post if you are interested.

2008-11-01: PrimeGrid - Preparing for the Prime Time Challenge

2008-10-31: PrimeGrid - The Prime Time Challenge

PrimeGrid's Challenge series continues with the Prime Time Challenge (14-16 November 2008). It's high time we initiated the new server and what better way to do it than with a Challenge. Also, it's time to return to the thrill of finding primes...and for that, we turn to PrimeGrid's newest project, the Proth Prime Search.Currently, these tests are rather short so this will also give us a good opportunity to "stress" test and fine tune the new server. The Proth Prime Search is slowly working its way up to the "reportable" prime level in Chris Caldwell's The Largest Known Primes Database!So please come join us as we initiate the new server and bring the Proth Prime Search to the "reportable" prime level. For more information, please see this forum thread.

2008-10-31: PrimeGrid - The Prime Time Challenge

2008-10-27: PrimeGrid - New server is live

While I'm writing these lines, the database is already running on the shiny new server in the new rack. While Murhpy has definitely played his role today, we hope that all troubles are gone and everything will be running smooth from now on. The first minutes seem promising, and the speed has improved significantly. We'll keep you posted. Big thanks for Willy for his work on the servers, and to all donators who helped make this server a reality!

2008-10-27: PrimeGrid - New server is live

2008-10-23: PrimeGrid - Scheduled downtime - new server installation!

We are planning a scheduled downtime of several hours on Monday, October 27. We will be relocating PrimeGrid and BOINCstats servers to the new rack, and will add a new server for PrimeGrid, which has been purchased using funds from the recent donation drive.

2008-10-23: PrimeGrid - Scheduled downtime - new server installation!

2008-10-03: PrimeGrid - "Optimal" sieve depth reached!

In a review yesterday of the Cullen/Woodall Project status, it was determined that we are at "optimal" sieve depth...actually, a little beyond it. Therefore, we are stopping the 32 bit and 64 bit Cullen/Woodall Sieve applications and archiving the sieve. Cullen/Woodall LLR will remain active up to n=10M. For more information, please see this forum post.

2008-10-03: PrimeGrid - "Optimal" sieve depth reached!

2008-10-01: PrimeGrid - Planned outage

We have just received a notice that the datacenter where PrimeGrid and BOINCstats are located are going to do planned maintenance on the electrical grid that is powering everything, so we will have an outage starting 23:00UTC. The outage is planned to last at least 3 hours. Sorry for the inconvenience; you may wish to cache a little more work this evening.

2008-10-01: PrimeGrid - Planned outage

2008-09-30: PrimeGrid - 10P milestone reached at PSP Sieve!

During the completion of the Challenge and in the excitement of reaching the funds for a new server, the Prime Sierpinski Problem Sieve entered into the 10P range. This was our "soft" goal for PrimeGrid's one year anniversary (13 October 2008). We reached it two weeks ahead of time. Congratulations everyone on this AMAZING accomplishment. For more information about the Prime Sierpinski Problem and next year's sieve goal, please see this forum post.

2008-09-30: PrimeGrid - 10P milestone reached at PSP Sieve!

2008-09-29: PrimeGrid - A new server is in PrimeGrid's future!

The Back to the Future Challenge has ended. Over 8000 Woodall WU's were completed by 204 teams and 1108 individuals. Congratulations to BOINCstats as the top team and lunarcom as the top individual. Also, thanks to the help of the anonymous donor as well as the hundreds of users who participated in the Challenge, we now have the funds to purchase a new server. For more stats and information, please see this forum post.

2008-09-29: PrimeGrid - A new server is in PrimeGrid's future!

2008-09-27: PrimeGrid - Message from Anonymous Donor

With just over half a day left in the Back to the Future Challenge, we have a solid green bar on the donation page. Congratulations everyone!!! The matching funds have come in as well as a message from the anonymous donor. A special thank you goes out to this individual for ensuring the continued growth of PrimeGrid.Best of Luck to everyone as this Challenge draws to an end.

2008-09-27: PrimeGrid - Message from Anonymous Donor

2008-09-24: PrimeGrid - The Back to the Future Challenge

Less than three days remain in the Back to the Future Challenge. There's still a battle for the top spot with BOINCstats holding off a fierce charge by the Canadians! :) Does either team have something up their sleeves for the last 72 hours? Only time will tell.Overall the Challenge is going well. We are almost to n=5.4M with a goal of 5.5M in sight. Additionally, donations are still being accepted for the new server. Currently, with the matching funds from the private donor, we have reached our goal. Any additional funds will go towards upgrading the server specs.A special thank you to everyone for helping out. Best of Luck in the next 72 hours.

2008-09-24: PrimeGrid - The Back to the Future Challenge

2008-09-20: PrimeGrid - The Back to the Future Challenge

Half way through and this is by far the most highly contested Challenge yet. Most surprisingly are the new teams and individuals atop the leader boards. A job well done by everyone. We are currently at the n=5.30M level with a goal of reaching 5.5M by the end. The Back to the Future Challenge has also made progress in donations for the new server. With seven days left, we have reached 52.8% of the funds needed. With the matching funds offer from the private donor, we need to reach at least 66.1%...the donor will complete the rest. One PrimeGrid user has started her own mini challenge, Krazy Kenzie's Server Challenge. She's just one donor away from success. :) Please check it out and see if you can help her make the "right" decision.

2008-09-20: PrimeGrid - The Back to the Future Challenge

2008-09-16: PrimeGrid - GIMPS set to claim $100,000 EFF award!!!

Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! On August 23rd, a UCLA computer discovered the 45th known Mersenne prime, 2^43,112,609-1, a mammoth 12,978,189 digit number! The prime number qualifies for the Electronic Frontier Foundation $100,000 award for discovery of the first 10 million digit prime number.By the way, the second prime discovered less than two weeks later was also more than 10 million digits. It's the the 46th known Mersenne prime, 2^37,156,667-1, and comes in at 11,185,272 digits. For more information, please visit the GIMPS site.

2008-09-16: PrimeGrid - GIMPS set to claim $100,000 EFF award!!!

2008-09-12: PrimeGrid - The Back to the Future Challenge

Less than 24 hours till the Back to the Future Challenge. Please come join us as we journey back to PrimeGrid's most successful project so far, the Woodall Prime Search, to help us prepare for the future.A private donor has made an anonymous "matching funds" offer matching all donations 1:1 made from now through the Challenge (13 Sept 18:00 UTC to 27 Sept 18:00 UTC) up to the total amount needed for the new server. For more information, please see this forum thread.

2008-09-12: PrimeGrid - 45th and 46th Known Mersenne Primes Found!!!!

Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! They have made extraordinary finds within two weeks of each other after going almost two years without a prime. We certainly marvel at this wonderful achievement.They are currently working on finding a suitable press outlet. More details will be announced early next week. The big question...is either one 10 million digits or more to claim the Electronic Frontier Foundation $100,000 award? :)For more information, please visit the GIMPS site. Again, congratulations!!!

2008-09-12: PrimeGrid - 45th and 46th Known Mersenne Primes Found!!!!

2008-09-12: PrimeGrid - The Back to the Future Challenge

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2008-09-06: PrimeGrid - The Back to the Future Challenge

PrimeGrid's Challenge series continues with the Back to the Future Challenge. We are very pleased and excited to announce that a private donor has made an anonymous "matching funds" offer. All donations made from now until the end of this Challenge (27 September) will be matched 1:1 (up to the total amount needed for the new server).Please come join us as we journey back to PrimeGrid's most successful project so far, the Woodall Prime Search, to help us prepare for the future. For more information, please see this forum thread.

2008-09-06: PrimeGrid - The Back to the Future Challenge

2008-08-31: PrimeGrid - Prime for 321 Prime Search

We are still awaiting contact with the pre-Challenge 321 Prime Search prime finder. If no contact is made soon, the prime will be transferred over to anonymous. PrimeGrid user, LadyHawk_A321, please contact project administrator at admin@primegrid.com as soon as possible. For more information on the prime, please see this forum thread.

2008-08-31: PrimeGrid - Prime for 321 Prime Search

2008-08-25: PrimeGrid - The Dog Days of Summer Challenge

Sirius has retreated to the horizon, but he refuses to go into the night sky without a prime. While the Challenge is over, the Dog Days remain...so let's put Sirius to sleep by finding that prime. It will take another 3-6 days for most results to be paired and declared valid. Therefore, Challenge rankings will not be finalized until then.The WU deadline was set to 3 days so unpaired results should be cleaned up quickly. For those who are interested in helping clean up these results, just leave your machines crunching 321 LLR for another 3 days.For up-to-date information, please see this forum thread.

2008-08-25: PrimeGrid - The Dog Days of Summer Challenge

2008-08-24: PrimeGrid - The Dog Days of Summer Challenge

Less than 24 hours remain. Sirius refuses to go back to the night. The only thing that is known to work is by feeding him a prime. So let's find that prime and bring the Dog Days of Summer to an end. :D For more information, please see this forum thread.

2008-08-24: PrimeGrid - The Dog Days of Summer Challenge

2008-08-22: PrimeGrid - Server down and back up

PrimeGrid server was inaccessible for about 30 minutes because the network at the datacenter where PrimeGrid and BOINCstats are hosted was down. The datacenter technicians seem to have brought the network back up, but we have no idea if it's going to stay up (the support phones of the hosting provider are down). Update 18:11 UTC: it seems that the power was cut to the building; the servers were forcibly rebooted. I'm checking for stuck system processes now. Update 18:15 UTC: validator was stuck; it's fixed now. I think everything is running smooth now.

2008-08-22: PrimeGrid - Server down and back up

2008-08-21: PrimeGrid - The Dog Days of Summer Challenge

Less than 24 hours till the Dog Days of Summer Challenge . For more information, please see this forum thread.

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2008-08-16: PrimeGrid - Prime for 321 Prime Search

The cooling rains have started early. In the run-up to the Dog Days of Summer Challenge, PrimeGrid's first 321 Prime Search prime has been discovered. Stay tuned for more details.UPDATE: 2008-08-18 We are still awaiting contact with prime finder.

2008-08-15: PrimeGrid - The Dog Days of Summer Challenge

Look yonder in the hot summer sky and you can see the clouds building. A storm is brewing in the distance...a storm to end the Dog Days of Summer. Please come join us in a 3 day (22-24 August - 72 hour) Challenge to usher an end to the hot sweltering days of summer. PrimeGrid's 321 Prime Search LLR application has been chosen. For more information, please see this forum thread.

2008-08-08: PrimeGrid - The Dog Days of Summer Challenge

PrimeGrid's Challenge series continues with the Dog Days of Summer Challenge. Please come join us in ushering an end to the hot sweltering days of summer. A 3 day (22-24 August - 72 hour) Challenge is being offered on PrimeGrid's 321 Prime Search LLR application. For more information, please see this forum thread.

2008-07-31: PrimeGrid - Riesel Sieve project information

For those of you wondering what is the problem with Riesel Sieve, here is a word from BOINC side administrator Bryan: Basically, the project creator has disappeared. People have been in contact with him, but we haven't heard any resumption date or even if things will resume. For the time being, I'm focusing my efforts on getting the non-BOINC side of the project up, as it is far easier and requires far less resources. We do not have access to any of the databases or we would have been able to restore things even without the project creator. Our wishes for RS to return as soon as possible.

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2008-07-27: PrimeGrid - PSP finds Mega Prime

The Prime Sierpinski Project has discovered their second mega prime: 258317*2^5450519+1. It is 1640776 digits long and will rank as the 12th largest known prime. The project has now found 17 primes total. There are only 12 primes left to solve the Prime Sierpinski Problem. For more information, please see this forum post.

2008-07-22: PrimeGrid - Back online

Database has been recovered, please read a lengthy explanation in this forum thread.

2008-07-21: PrimeGrid - Database issues

We are having database issues...stay tuned for more information.

2008-07-21: PrimeGrid - The Lunar Landing Challenge

"Houston, Tranquility Base here. The Eagle has landed." The Lunar Landing Challenge is over. Over 525,000 WU's were completed by 193 teams and 1331 individuals. Congratulations to SETI.Germany as the top team and Banshee as the top individual. For more stats and information, please see this forum post.

2008-07-19: PrimeGrid - The Lunar Landing Challenge

T-plus 24 hours after liftoff and all systems are nominal. :) The start severely stressed the vehicle, but it eventually made it into orbit. 48 hours remain until the Lunar Landing. For more information, please see this forum thread.

2008-07-17: PrimeGrid - The Lunar Landing Challenge

T-minus 10 hours till liftoff and all systems are go. A 3 day (18-20 July - 72 hour) Lunar Landing Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread.

2008-07-15: PrimeGrid - The Lunar Landing Challenge

T-minus 3 days and counting. Unlike NASA, there are no holds in this countdown! :) Please come join us in commemorating the 39th Anniversary of the lunar landing by Apollo 11. A 3 day (18-20 July - 72 hour) Lunar Landing Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread.

2008-07-14: PrimeGrid - WU's lengthened

PrimeGrid is experiencing an increase in activity. In order to minimize the database AND to prepare for the upcoming Lunar Landing Challenge, sieve WU's have been lengthened. Credit has been adjusted accordingly. For more information, please see this post.

2008-07-10: PrimeGrid - Database issues

We are having database issues, stay tuned for more information. Update 5:38 UTC: the database has been brought back online.

2008-07-07: PrimeGrid - Server software upgrade

[edit] Upgrade completed way ahead of schedule at 11:40 UTC. I am upgrading server software, so the project is offline. Estimated time of upgrade completion - 13:00 UTC. After the upgrade is completed, I will update this newspost. Post any issues you think may be caused by the upgrade to this thread.

2008-07-06: PrimeGrid - The Lunar Landing Challenge

PrimeGrid's Challenge series continues with the Lunar Landing Challenge. Please come join us in commemorating the 39th Anniversary of the lunar landing by Apollo 11. A 3 day (18-20 July - 72 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread.

2008-06-29: PrimeGrid - 3*2^n-1 switched to +1

We've switched 3*2^n-1 subproject, which has been completed to n=5M and had no more work, to 3*2^n+1. The tasks are significantly shorter now (in the range of minutes), but it will change quite rapidly as we progress through the test space.

2008-06-13: PrimeGrid - PrimeGrid's Birthday Challenge

The Birthday Party is over and all the candles have been blown out. Over 200,000 WU's were completed by 84 teams and 374 individuals. Congratulations to L'Alliance Francophone as the top team and Banshee as the top individual. For more stats and information, please see this forum post page.

2008-06-11: PrimeGrid - PrimeGrid's Birthday Challenge

Less than a day remains until the Birthday Challenge begins. We are celebrating PrimeGrid's 3rd Birthday with a 24 hour Challenge on the Twin Prime Search. Please check your local time zones to determine your exact Challenge time: 12 June 2008 00:00 UTC to 13 June 2008 00:00 UTC. For more information, please see this forum thread.

2008-06-07: PrimeGrid - PrimeGrid's Birthday Challenge

PrimeGrid's Challenge series continues with the Birthday Challenge. Please come join us in celebrating PrimeGrid's 3rd Birthday. A 24 hour Challenge is being offered on PrimeGrid's oldest active application, the Twin Prime Search. Hopefully we'll be able to give PrimeGrid a good present by finding the twin during the Challenge. :) For more information, please see this forum thread.

2008-06-01: PrimeGrid - The Drive for Five Challenge

The Checkered flag is out...and The Drive for Five Challenge has ended. 22512 WU's were completed by 255 teams and 1681 individuals. Congratulations to L'Alliance Francophone as the top team and Banshee as the top individual. Remember, the top 40 places earn points for this Challenge. For more stats and information, please see this forum post page.

2008-05-30: PrimeGrid - The Drive for Five Challenge

Less than 48 hours remain in the Challenge. For teams, places 1-4 are pretty much wrapped up. However, there is a tight 3-way battle for 5th place and several others beyond that. For individuals, there are many tight races below the top 3. Remember, due to the length of the Challenge, places 1-40 will earn Challenge Points this time. For more information, please see the Challenge Series page.

2008-05-23: PrimeGrid - The Drive for Five Challenge

Half way through the Challenge...and although an incredible amount of work has been accomplished, the numbers have the upper hand right now. 13020 WU's have been completed but 16036 remain. Our goal is still to reach n=5M. Therefore, we are hosting a sprint this weekend to see if we can get back even or maybe ahead of where we need to be in order to reach 5M by the end of 31 May. For more information, please see this forum post.

2008-05-16: PrimeGrid - The Drive for Five Challenge

24 hours into the Challenge and all is going well. 2100 WU's have been sent out and 26956 remain. Stats and more information can be found in this forum thread.

2008-05-14: PrimeGrid - The Drive for Five Challenge

Only 24 hours remain until The Drive for Five Challenge begins. Please check your local time zones to determine the start of the challenge: 15 May 2008 00:00 UTC. For more information, please see this forum thread.

2008-05-11: PrimeGrid - Updated application for TPS subproject - now has a screensaver!

New application version for TPS subproject has been released. If it behaves correctly, I will release it for other subprojects. For the first time, it also features a screensaver!

2008-05-09: PrimeGrid - The Drive for Five Challenge

PrimeGrid's Challenge series continues. Please come join our effort to reach n=5 million in the 321 Prime Search (3*2^n-1). The Challenge will begin 00:00 UTC, 15 May 2008. For more information, please see this forum thread.

2008-05-07: PrimeGrid - Problems saving preferences

We are aware of the issues saving your preferences (the message states that the changes have been saved, which doesn't actually happen), and are working to resolve the issue. It has been reported that logging out and in again helps, so you might try that as a workaround. UPDATE: as of 16:00 UTC preferences saving should work.

2008-04-30: PrimeGrid - Sieve WU lengths increased

In an attempt to lower the size of the database, we have increased the WU length to both the PSP Sieve and GCW Sieve projects. WU's are now 1.5X as long...so a 6 minute WU now takes 9 minutes. Credit has been adjusted accordingly.

2008-04-26: PrimeGrid - Workunit deadlines increased

The deadlines for subprojects that have very long workunits have been increased to 12 days. The subprojects affected are Woodall Prime Search, Cullen Prime Search, 321 Prime Search and Prime Sierpinski Project (all LLR).

2008-04-23: PrimeGrid - Standalone screensaver application published for testing

Nicolas has posted a standalone PrimeGrid screensaver application which is going to be included within the next science application update. We are looking for people to try it out on their computers so that we know it runs fine before we publish it project-wide. Visit the thread in the forums to find more about it.

2008-04-23: PrimeGrid - Can you survive for 24 hours without your computer?

It is obvious that without computers we would find our life extremely difficult, maybe even impossible. If they disappeared for just one day, would we be able to cope? Be part of one of the biggest global experiments ever to take place on the Internet. The idea behind Shutdown Day is to find out how many people can go without a computer for one whole day, and what will happen if we all participate! Shutdown your computer on 03 May 2008 and find out! Visit shutdownday.org and join the campaign! (And before you ask - no, PrimeGrid server isn't going down on that day)

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2008-04-18: PrimeGrid - Mega Prime for 321 Search

On 23 Mar 2008 7:57:28 UTC, PrimeGrid, in collaboration with 321 Search, found another Mega Prime: 3*24235414-1 The prime is 1,274,988 digits long and enters The Largest Known Primes Database ranked 14th overall. This is 321 Searches's first mega prime and 11th prime overall. It is the second largest found mega-digit prime using LLR. The discovery was made by Dylan Bennett of Canada using an Intel C2D @ 1.66 GHz with 2GB RAM. This computer took almost 15 hours and 30 minutes to complete the primality test. For more details, please see the official announcement. Decimal representation of the number is also available.

2008-04-17: PrimeGrid - Mega Prime for 321 Search

A PrimeGrid participant has discovered a Mega Prime for the 321 Search project. Stay tuned for more details.

2008-04-14: PrimeGrid - Updated statistics for prime finders

We have released an updated prime finder statistics page, which now counts primes find in all subprojects. The prime numbers are assigned a score which differs according to prime number size, so a giant Woodall prime is "worth" more than a smaller TPS prime. The next step in improving statistics is to show the participants all the primes that have been found, which isn't yet available in the current version, but is coming soon.

2008-04-14: PrimeGrid - Project Staging Area

After two months of testing, the Project Staging Area is officially open. This area was established to help prepare future projects for entry into PrimeGrid BOINC. It also offers a sneak peak into these projects by allowing users a chance to crunch them ahead of time. For more information, please see this forum thread.

2008-04-10: PrimeGrid - PSP finds Mega Prime

The Prime Sierpinski Project has discovered their first mega prime: 265711*2^4858008+1 (1462412 digits long). The project has now found 16 primes total. There are only 13 primes left to solve the Prime Sierpinski Problem. For more information, please see this forum thread.

2008-03-26: PrimeGrid - Up and running again

We are back up and running. For a detailed explanation of the events that caused the outage, please see the forum thread.

2008-03-22: PrimeGrid - PrimeGrid Database Issues

The aftermath of the Ides of March Challenge has taken its toll as the database has been experiencing issues since 20 March 2008. Conditions are slowly starting to improve. For more information, please see this forum thread.

2008-03-16: PrimeGrid - The Ides of March Challenge is Complete

Congratulations everyone on a job well done. The participation was well beyond our expectations. We exceeded our initial goal of 50K WU's and our advanced goal of 250K WU's downloaded. Additionally, we completed well beyond the sieve depth of p=2500T so a GREAT milestone for the Prime Sierpinski project and Seventeen or Bust. For more details on results, please see this forum post.

2008-03-15: PrimeGrid - The Ides of March Challenge

First 12 hours of the challenge have gone well! 186.1K WU's have been downloaded so far. Our original goal was 50K and that was hit 1 hour 35 minutes into the Challenge. Quite AMAZING!!! For an updated status, please see this forum post.

2008-03-14: PrimeGrid - The Ides of March Challenge

Less than 10 hours until the Ides of March. There has been an unprecedented run-up before the Challenge. We can sense the impending doom for 1000's of k/n pairs. For updated information, please see the forum thread.

2008-03-12: PrimeGrid - The Ides of March Challenge

Only 3 days remain until the Ides of March. Please check you local time zones to determine the start of the challenge: 15 March 2008 00:00 UTC. For updated information, please see the forum thread.

2008-03-08: PrimeGrid - The Ides of March Challenge

With the Ides of March just a week away, we wish to offer a challenge. Come join a one day effort in an attempt to push the Prime Sierpinski Sieve to over 50,000 WU's in one day and thus reach the p=2500T sieve depth. For more information, please see the forum thread.

2008-03-02: PrimeGrid - 64bit Linux sr2sieve

A 64bit Linux sr2sieve application has been released for the Prime Sierpinski Problem sieve. For more information, please see the forum post.

2008-02-27: PrimeGrid - Upcoming Projects

PrimeGrid will soon be offering three new projects. For more information about these and future considerations, please see the forum thread.

2008-02-20: PrimeGrid - Problems with 64bit Windows PSP Sieve fixed

Version 1.04 of PSP Sieve application has been released, fixing the issue with 64bit Windows hosts.

2008-02-19: PrimeGrid - Problems with 64bit Windows PSP sieve application

We have temporarily disabled 64bit Windows PSP Sieve application because it was crashing and locking up BOINC client. We are investigating the cause for that; for now 32bit application will be sent instead.

2008-02-18: PrimeGrid - 64bit Linux gcwsieve

I know some of you were eagerly awaiting this. Well, the time has come - we now started testing 64bit Linux gcwsieve application. For more information, see the forum thread.

2008-02-15: PrimeGrid - End of the life cycle of primegen application

We are inserting the final batches of work for our oldest available application, primegen. While primegen has proved to be very useful in the early project stages for infrastructure testing, it has served it's purpose and it's time to make way for newer, more efficient applications. Once the final batches are completed the cleanup will be executed, finally removing old stuck workunits. We suggest participants running primegen exclusively also select an additional subproject for future processing. Sieve subprojects are very similar to primegen in size, so it is probably a good choice. Once there are no more primegen work to send, we will update project for such participants to select sieve subprojects.

2008-01-31: PrimeGrid - Unscheduled outage

PrimeGrid is down for a moment, because workunit table has crashed; the repair process is running right now. Thanks to Lennart from Sweden who called me on the phone and told about the problem. Update 14:22 UTC: We're back up.

2008-01-10: PrimeGrid - TPS work available again

Twin prime search work is available again (we had a few days outage for this subproject because work supply went dry).

2007-12-29: PrimeGrid - Record breaking Woodall prime

On 21 Dec 2007, 10:09:30 UTC, PrimeGrid's Woodall Prime Search found the 33rd and largest known to date Woodall prime: 3752948*23752948-1 The prime is 1,129,757 digits long and enters The Largest Known Primes Database ranked 1st for Woodall primes and 13th overall. It's the first found mega-digit prime using LLR. The discovery was made by Matthew J. Thompson of the United States using an Intel P4 @ 2.8 GHz with 512MB RAM. This computer took almost 15 hours and 11 minutes to complete the primality test.

2007-12-28: PrimeGrid - 1 million digit prime

A user of PrimeGrid has discovered a Woodall prime which is over 1 million digits long. It is the biggest Woodall prime ever discovered, and 13th biggest known prime of any kind. Stay tuned for more details.

2007-12-16: PrimeGrid - Code upgrade

Server backend code has been upgraded, the option to decline team founder transfer now works. If you notice any errors (no, dozens of buttons in the forum is not an error), please post in the forums or use the contact link available in every page in the very bottom.

2007-12-09: PrimeGrid - Scheduled downtime

During the night of December 14/15 (Europe time) PrimeGrid server will be down because of scheduled maintenance in the datacenter where PrimeGrid and BOINCstats are hosted. The downtime is needed to upgrade power infrastructure, because currently there isn't enough backup power (UPS) to run all the servers in case of a power outage.

2007-12-09: PrimeGrid - Scheduled downtime

2007-12-05: PrimeGrid - Unexpected outage (resolved)

Results table has crashed, the project is offline while we recover data. Update: the issue has been resolved at 8:57 UTC.

2007-12-05: PrimeGrid - New subproject available

We have released the LLR application for the 321 Search. 321 is attempting to find a mega prime in the form 3*2^n-1. The 4+ year old project currently holds the largest non-GIMPS/non-Seventeen or Bust prime. As usual, you can choose to crunch work for this project by visiting your project preferences page. Supported platforms: 32bit Linux & Windows.

2007-12-05: PrimeGrid - New subproject available

2007-12-05: PrimeGrid - Unexpected outage (resolved)

Results table has crashed, the project is offline while we recover data. Update: the issue has been resolved at 8:57 UTC.

2007-10-30: PrimeGrid - Automatic reporting to the Prime Pages available

From now on you can give permission to PrimeGrid to report the primes you find to the Prime Pages on your behalf. To do this, go to the project preferences page and enter your data.

2007-10-30: PrimeGrid - Automatic reporting to the Prime Pages available

From now on you can give permission to PrimeGrid to report the primes you find to the Prime Pages on your behalf. To do this, go to the project preferences page and enter your data.

2007-10-27: PrimeGrid - Backend code upgrade

The backend code has been upgraded. There were some issues related to the web code, but they seem to be fixed. If you find any problems that I missed, please post in the forums.

2007-10-26: PrimeGrid - Backend code upgrade

The backend code has been upgraded. There were some issues related to the web code, but they seem to be fixed. If you find any problems that I missed, please post in the forums.

2007-10-14: PrimeGrid - Linux LLR available!

Good news for Linux lovers - with the help from our user Der Meister we have released 32bit Linux LLR application for Twin Prime Search project. If it goes well, it will be released for Cullen/Woodall Prime Search, too. The 32bit application is also being sent to 64bit hosts.

2007-10-14: PrimeGrid - Linux LLR available!

2007-10-13: PrimeGrid - Prime Sierpinski Project sieve available

We have released Sieve application for Prime Sierpinski Project. It is trying to solve the Prime Sierpinski Problem. Windows 32bit and 64bit versions are supported. As usual, you can choose to crunch work for this project by visiting your project preferences page.

2007-10-13: PrimeGrid - Prime Sierpinski Project sieve available

2007-09-30: PrimeGrid - LLR Cullen percentage reporting bug fixed

Thanks to Bryan from Riesel Sieve, the Cullen workunit progress reporting bug has been fixed. The workunits running application version 5.08 should correctly display feedback during processing.

2007-09-30: PrimeGrid - LLR Cullen percentage reporting bug fixed

Thanks to Bryan from Riesel Sieve, the Cullen workunit progress reporting bug has been fixed. The workunits running application version 5.08 should correctly display feedback during processing.

2007-09-29: PrimeGrid - 64bit sieving application available

A 64bit Windows version of GCW sieve application has been released. It improves speed twice comparing to 32bit version. The new application is automatically sent to hosts running 64bit version of BOINC that have sieving subproject enabled in the project preferences.

2007-09-29: PrimeGrid - 64bit sieving application available

2007-09-15: PrimeGrid - Cullen/Woodall Sieve available

We have released a sieving app for Cullen/Woodall Prime Search. Sieving will help to greatly reduce the amount of probable primes, therefore speeding up the actual prime search. You can choose to run sieve application by visiting project preferences page; please have in mind that the application has just been released, so it may have bugs or issues (although we haven't noticed any). Supported platforms: Windows 2000/XP/2003/Vista.

2007-09-03: PrimeGrid - Record Woodall prime number found... again!

On 20 Aug 2007, 2:40:57 UTC, PrimeGrid's servers returned a positive result in the Woodall Prime Search. It was the double check validating that a Woodall prime was found on 13 Aug 2007, 1:42:08 UTC. 2367906*22367906-1 This is the 32nd and largest known to date Woodall prime. It is 712818 digits long and enters The Largest Known Primes Database (http://primes.utm.edu/primes/) ranked 1st for Woodall primes and 25th overall. The discovery was made by Stephen Kohlman of Canada using an Intel C2D 6300 @ 1.86 GHz with 1 GB RAM. This computer took a little over 5 hours and 41 minutes to test using the LLR program. Stephen is a member of Canada team.

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2007-09-03: PrimeGrid - Leaving to Geneva

I will be leaving to Geneva for BOINC Workshop early tomorrow morning. This means that the project will have to run unattended for almost a week (I will of course monitor the server, but my time will be limited, so don't expect quick fixes if something dies).

2007-08-25: PrimeGrid - Message to participant "Owner"

Message to project participant known as "Owner" or "big steve": please contact project administrator at admin@primegrid.com. Your computer has made a significant discovery, and we want to know your details before we publicize it.

2007-08-19: PrimeGrid - Network maintenance

Tonight at 0:00UTC network maintenance will be performed in the datacenter where PrimeGrid server is hosted. The maintenance is planned to last approximately 30 minutes, during it the access to the project might be slow or unavailable. Sorry for the inconvenience.

2007-08-09: PrimeGrid - Record Woodall prime number found

On 7 Aug 2007, 15:25:07 UTC, PrimeGrid's servers returned a positive result in the Woodall Prime Search. It was the double check validating that a Woodall prime was found on 4 Aug 2007, 19:36:57 UTC. 2013992*22013992-1 The prime is 606279 digits long and enters The Largest Known Primes Database (http://primes.utm.edu/primes/) ranked 1st for Woodall primes and 37th overall. The discovery was made by Lasse Mejling Andersen of Denmark using an Intel Celeron 2.80 GHz with 512 MB RAM. This machine took a little over 3 hours and 27 minutes to test using the LLR program. For more details, please see here.

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2007-08-08: PrimeGrid - Biggest ever Woodall prime discovered!

A few minutes ago PrimeGrid validated a workunit that had discovered the biggest Woodall prime ever discovered. More information will follow up later.

2007-08-06: PrimeGrid - Validation suspended

Validation of returned results may be slow or even temporarily suspended while we sort the problems that appeared because of software upgrade. All credit will be granted, no work is lost.

2007-08-04: PrimeGrid - Statistics moved

Stats sites should update references to PrimeGrid stats - filenames have changed because of recent code update.

2007-08-03: PrimeGrid - Maintenance extended

The maintenance has been extended because of issues getting new work.

2007-08-02: PrimeGrid - Shutdown for maintenance

PrimeGrid will be shut down for major software upgrade on August 3rd, 15:00UTC. The outage will last at least 4 hours, but may well be extended up to 48 hours.

2007-07-03: PrimeGrid - New subproject added

We have added a new prime search project, Cullen/Woodall prime search. These primes are of forms n*2n+1 and n*2n-1 respectively. Our goal is to find the biggest Cullen and Woodall primes ever. This isn't as easy as it may sound, only 14 Cullen primes and 30 Woodall primes have ever been found, however, we believe that PrimeGrid has sufficient computing power to make this search plausible. It is now possible to choose the subprojects you would like to run in project preferences page. Please note that when you are using account managers your choice may be reset when changing resource share allocation.

2007-06-15: PrimeGrid - Twin Prime Search progress

Our user Terminal has been collecting statistics about our progress in the current Twin Prime Search project. Please see this thread for more information.

2007-06-06: PrimeGrid - 10 million workunits sent

Today marks the day when 10 millionth workunit was issued in the project. While this is nothing more than a simple numeric milestone, it is a really nice number to reach in the project that is all about numbers. The workunit was crunched by the computer owned by user Strelnieks. Congratulations!

2007-04-11: PrimeGrid - Project restarted

The service has been restored, and the work should start flowing again. The scheduler has been optimized, so recovery time should take less than usual after a big outage.

2007-03-24: PrimeGrid - 50% of required amount acquired

Yesterday we surpassed 50% of our donation drive target, and have ordered most of the parts of the new server, although it will take at least 2 weeks to receive them. Thanks to everyone who has made this possible. However, we still need money to buy final parts and to cover increasing collocation costs and possible upgrades to the current servers. Please help by donating today.

2007-02-28: PrimeGrid - 100!

PrimeGrid has reached the milestone of 100 primes reported to the Prime Pages. Thanks to all crunchers who made this possible! Also, please check your mailbox, it is really possible that you received an email asking to report the primes you found, and put your name into the top 5000 list of biggest prime numbers of all times.

2007-02-24: PrimeGrid - Reporting world record prime numbers

PrimeGrid's Twin Prime Search subproject has been recently finding prime numbers that are among top 5000 biggest prime numbers ever known. We want the prime finders to be correctly credited so that their names appear on scientific papers (if any), so we have been sending out emails to the participants who find the numbers. However, the prime reporting rate is relatively low, and we think that this might be because of some email software incorrectly marking our emails as spam. If you run LLR application from PrimeGrid in your BOINC, please check your spam folder and/or allow emails from services@www.primegrid.com to go to your inbox - you might be loosing a chance to have your name tied with an important scientific discovery!

2007-02-21: PrimeGrid - Credit reduction explanation

We have removed credits from the user who has been using trojan software to install BOINC on unsuspecting people's computers. The next stats site update should show a decrease in PrimeGrid total credit.

2007-02-19: PrimeGrid - Donation drive update

We are slowly inching towards our goal. We are currently at 40.8%, which equals to 3058.45 Euro (taking PayPal fee into account). 148 people have donated, with donations ranging from 2 to 250 Euro. The average donation is 20.57 Euro.We are still quite far from our target, please consider helping today!

2007-02-17: PrimeGrid - Suspending Primegen work for the weekend

I am suspending work generation for one of the PrimeGrid applications, primegen, to help clear out assimilation and database cleanup queues. Work for LLR application will be issued as usual. Work generation for primegen will be reenabled in the Sunday evening (Europe time). To get LLR work during primegen outage, go to PrimeGrid preferences page and enable test applications.

2007-02-11: PrimeGrid - LLR Applicationd

LLR application has been updated to version 5.06. It should fix the occasionally popping up LLR window on some systems. Your BOINC will get updated application automatically.

2007-01-15: PrimeGrid - TPS status update

The Twin Prime Search project, currently in testing in PrimeGrid, has successfully found a twin prime, therefore no work will be issued in testing subproject PrimeGrid for some time. The older primegen application will continue running. More information to follow later.

2006-12-28: PrimeGrid - Donation drive update

With the help from 64 people, the donation drive is at 20.40%, which equals to about â¬1530 out of required â¬7500. The average donation is â¬23.90. We still have a long way to go, and your help is very valuable to us. Please consider donating today at http://www.primegrid.com/orig/donations.php.

2006-12-22: PrimeGrid - Twin Prime Search LLR application update

An updated LLR application for Twin Prime Search subproject has been released. This version should fix the two main problems: LLR window that pops up randomly, and suspending/termination issues.

2006-12-03: PrimeGrid - BOINCstats/BAM!/PrimeGrid fundraising drive

We are starting our annual fundraise to raise the funds needed to run BOINCstats, BAM! and PrimeGrid in 2007 and to keep the projects in working order. You can read more on our fundraising page (http://www.primegrid.com/orig/donations.php). Please help us reach our goal by contributing today.

2006-12-02: PrimeGrid - Shutdown for maintenance

PrimeGrid will be shutdown for maintenance on Dec 03 at about 10:00 UTC. You will be able to return work, but no new work will be issued during the time of maintenance. The outage is supposed to last about 8 hours.

2006-11-26: PrimeGrid - New Application Testing

PrimeGrid has started testing a new application for more sophisticated prime number searches. The new sub-project is created in collaboration with Twin Prime Search project. Please note that the new application is in quite early stages of development and might have issues. Therefore it is only sent to people who choose to run test applications. We do not recommend running this application on production systems. To enable test applications, go to project preferences page and choose to allow test applications.

2006-10-22: PrimeGrid - Database problems

We are currently experiencing bad database load. The scheduler will be offline during the night and we will take care of the database the first thing in the morning. Thank you for your patience.

2006-08-28: PrimeGrid - Unexpected outage

We experienced an unexpected outage because of result table crash. It was impossible to get new work and return completed results for about 8 hours. The issue has been fixed.

2006-07-31: PrimeGrid - Buy PrimeGrid souvenirs

Good news for all PrimeGrid fans - you can now support the project and get something in return (apart from credits) - we have just released a page that offers you a unique opportunity to get a limited availability mug branded with PrimeGrid logo. The prices might seem a little high, but please remember that all the funds that are earned from the mugs are used to support the project. Visit the new "Buy PrimeGrid souvenirs" page Post any issues you encounter in this forum thread.

2006-07-28: PrimeGrid - Unexpected outage

We had an unexpected outage because result table crashed in the process of trying to optimize it. The functionality is now restored.

2006-07-17: PrimeGrid - BOINC survey

Please fill out the BOINC user survey.Your responses will help us improve PrimeGrid and BOINC itself.

2006-07-09: PrimeGrid - Server upgrades

On Thursday PrimeGrid server has been upgraded. We are now running maximum memory capacity available to this server, 4GB. Big thanks to all users who helped by donating.

2006-07-02: PrimeGrid - New results

Due to an error within result exporting software the prime numbers in the first two result packages were in the mixed order. This has been fixed and results have been republished. If you were seeding the results, please redownload them from the original tracker. We currently have published prime numbers up to 4000000000.

2006-07-01: PrimeGrid - Recent work supply problems

Recently work supply has been intermittent due to crashing work generator. This seems to be resolved now, and work is flowing again. Sorry for the inconvenience.

2006-06-04: PrimeGrid - First results published

PrimeGrid has published the first prime numbers that have been found. We are using Bittorrent technology for distributing the results to lower the bandwidth usage on the server, but the download might be a bit slow while only a few people have complete file. Therefore we ask you to help distribute the results by downloading and keeping your Bittorrent client open to seed the files. For more information on Bittorrent, see Wikipedia.

2006-05-26: PrimeGrid - Work generation suspended

Work generation has been temporarily suspended due to ongoing server performance problems. Only workunits that end with error or expire will be reissued for now. The problems occur because the database has outgrown installed memory size. If you can spare some money for memory upgrade, please visit donation page.

2006-05-03: PrimeGrid - Credit granted for results marked as invalid

Due to differences between file formats between application versions 5.09 and below and 5.10 and higher validator rejected some results. The claimed credit has been granted for such results with valid output files, but no more than workunit canonical credit. If any more unmatching results from older version are returned, the credit for them will also be granted.

2006-05-01: PrimeGrid - Work generator problem

We experienced a work generator problem that prevented getting work even though it was being generated. It has now been resolved.

2006-04-29: PrimeGrid - Crashing application - solved?

I have tested an experimental feature to remove a corrupt file that was causing problems with the application from the hosts that were not reset yet. It seems that it works now, but if you still have problems starting the new PrimeGen application, I still ask you to reset the project (information how to do that may be found in the message boards).

2006-04-25: PrimeGrid - New application - important information

We are currently publicly testing a new application for PrimeGrid. The first test proved very unsuccessful because of a corrupted file. The new application version fixes the problem, however, because of the BOINC nature we are unable to replace the file that is already downloaded (and cannot use a different name for it for other reasons). If you see crashing results from application PrimeGen 5.09 (or later, if we need to release a higher version), please reset the project. Sorry for the inconvenience.

2006-03-25: PrimeGrid - DNS propagation issues

Recently we moved servers and some users are reporting that they are unable to get work although they can browse the website at the new server. This is due to the fact that the server address has been changed and BOINC remembers the old one. A simple solution for this would be to restart BOINC, or wait for some more time for BOINC DNS cache to expire.

2006-03-22: PrimeGrid - Server migration

PrimeGrid has been migrated to the new server. This includes DNS updates, so you (and your BOINC client) might not be able to access it for some time until DNS change propagates. We took the opportunity to implement a few changes into the scheduler (that you most probably will not see), and deployed updated BOINC forum code (not yet fully available for public, currently in testing only at BURP and PrimeGrid). If you notice any problems, please report them in the new Help Desk (make sure you do not post it if someone has already reported the problem).

2006-03-08: PrimeGrid - Server back up

For some reason we lost network connectivity on port 80 (http) three days ago. We blamed the ISP for that, but it seems that it had nothing to do with it - connectivity got restored with any actions from our side as suddenly as it was lost. Everyone should be able to report old work and get new tasks. In addition, if all goes well, we are going to move to a new server with much better connectivity real soon.

2006-02-20: PrimeGrid - Data loss and recovery

PrimeGrid server suffered from a data loss. The website was brought offline and scheduler suspended. However, all files have been successfully recovered (database was not affected), and we are fully operational again.

2006-02-19: PrimeGrid - Data loss and recovery

2006-02-17: PrimeGrid - Server upgrade

The server has been brought down a few minutes ago and additional RAM was installed in hopes to solve the problems with the server speed and hopefully connection drops. After the memory was installed we experienced some problems with the networking, but they have been resolved successfully.

2006-02-16: PrimeGrid - Server upgrade

2006-02-13: PrimeGrid - Maintenance complete

The maintenance is complete and work generator has been turned back on.

2006-02-12: PrimeGrid - Maintenance complete

The maintenance is complete and work generator has been turned back on.

2006-02-12: PrimeGrid - Server maintenance

The work generator has been turned off. We want to clear the corrupted tasks that are hanging in the database since the work generator problem last year. We cannot do that while there are normal results to be sent. The expected outage time will be about one hour after the workunit supply drain.

2006-02-10: PrimeGrid - Status update on connection problems

Ageless has posted a thread with the status update of our work while trying to solve connection problems.

2006-02-04: PrimeGrid - Server unreachable

The server was totally unreachable for 12 hours due to connectivity problems. The ISP has restored the service, the server is back up and running.

2006-01-26: PrimeGrid - Server software upgrade

Server software has just been upgraded. We are now running PHP5. If you experience any problems related to the update, please report them in the forum.

2006-01-05: PrimeGrid - Please support

As you may have noticed, PrimeGrid has been very slow recently and timeouts are occuring now and then. We are now trying to build a brand new server, but this will not happen without your help, as we are seriously lacking money for the construction of the server. The server will be constructed by Sascha Bickel ("BOINC Team Science and Research Hessen") and will be hosted in Germany. All donations are directed to him to reduce money transfer expenses. Please visit donation page to donate.

2006-01-03: PrimeGrid - Network connection restored

The network connection has just been restored. The provider (Charter Communications) left us with information that "there was an outage in the area" for more than 24 hours, without any status updates. We are glad to be back up and running.

2005-12-23: PrimeGrid - Scheduler update

The new scheduler with updated handling of preferences has been installed. The current system finally supports venues. Please report any problems in the forum.

2005-12-23: PrimeGrid - Scheduler

The new scheduler with updated handling of preferences has been installed. The current system finally supports venues. Please report any problems in the forum.

2005-11-19: PrimeGrid - Routers Received

Good news to us all - we have finally received our brand new D-Link routers! This means we will hopefully be having no outages because of hanging routers. Thanks to everyone who have made this possible. We are going to have an short outage today to install and configure the new equipment.

2005-11-19: PrimeGrid - Routers Received

2005-11-09: PrimeGrid - Validation Problems

We are currently having validation problems. Some workunits are being marked as invalid, although they are processed correctly. All workunits marked as invalid will be revalidated and credit will be granted.

2005-11-09: PrimeGrid - Validation Problems

2005-11-08: PrimeGrid - Project temporarily suspended

The project has been temporarily suspended due to the fact that another team has announced that they have successfully found the factors.

2005-11-08: PrimeGrid - Project resumed with new application

We have resumed the work with the challenge. We are now taking RSA768 (yes, we skipped one. Everyone else is allowed to take it ;)). The work generation is a bit slower than previously, as we monitor all possible problems with the new application. We are still waiting for the results from the previous challenge; they will be validated and credited. Please note that time required to finish one workunit is now 5 times longer. This has been done to reduce the strain on the server. We also had a lock-up today, our router has stopped responding once again.

2005-11-08: PrimeGrid - Project Temporarily Suspended

The project has been temporarily suspended due to the fact that another team has announced that they have successfully found the factors.

2005-11-08: PrimeGrid - Project resumed with new application

We have resumed the work with the challenge. We are now taking RSA768 (yes, we skipped one. Anyone else is allowed to take it ;)). The work generation is a bit slower than previously, as we monitor all possible problems with the new application. We are still waiting for the results from the previous challenge; they will be validated and credited. Please note that time required to finish one workunit is now 5 times longer. This has been done to reduce the strain on the server. We also has a lock-up today, our router has stopped responding once again.

2005-10-20: PrimeGrid - Back after the outage

We are back after the outage. It occured because of a malfunctioning network component. Everything should be well now.

2005-10-07: PrimeGrid - Optimisation

A few workunits have been issued using a new version of RSA application (4.05). The workunit completion time with this application is optimised by 20%. If the test workunits come back correctly, the 4.05 version will be released publicly.

2005-09-23: PrimeGrid - One Million

We have just hit 1-millionth credit. This is very good news to us. Also, a lot of old pending credits have been granted, and the process is still continuing, howeverm it is now automated instead of manual granting.

2005-09-22: PrimeGrid - One Million

2005-09-13: PrimeGrid - PrimeGrid is back

We have finally got back primegrid.com. Big thanks to Cori for that! The project is now back and running.

2005-09-07: PrimeGrid - Hosting discontinued

The account for PrimeGrid has been suspended due to overload being caused. I am looking for a solution, hopefully, I may get a 4-pc cluster for use at my university. The domain has temporarily parked until I find the solution.

2005-09-06: PrimeGrid - Server Load Problems

We are having problems with the server load. The scheduler is offline until we optimise the database queries.

2005-09-05: PrimeGrid - Server Load Problems

We are having problems with the server load. The scheduler is offline until we optimise the database queries.

2005-09-03: PrimeGrid - Recommendations

I would recommend reattaching to the new URL (once you are out of work) for a few reasons: * The redirection from the old to the new server sometimes causes problems * The old domain name will not stay forever * The old domain name is pointing to the old server, so if it is offline you will not be able to fetch master file and/or contact scheduler on the new server unless attached to the new url. The new URL for reattaching is http://www.primegrid.com/

2005-09-02: PrimeGrid - Recommendations

2005-09-01: PrimeGrid - The New Name

We now have a new name: please welcome, PrimeGrid!

2005-08-31: PrimeGrid - The New Name

We now have a new name: please welcome, PrimeGrid!

2005-08-31: PrimeGrid - The New Name

We now have a new name: please welcome, PrimeGrid!

2005-08-30: PrimeGrid - Project Name Contest

We are currently considering changing the project name, as it no longer fits our goal. Please have a look at this thread to post your ideas. The owner of the best name will receive 1000 credits as thank-you gift for it! Be quick, we do not have much time.

2005-08-29: PrimeGrid - Project Name Contest

2005-08-26: PrimeGrid - Outage explained

The hard disk of the server crashed, and everything modified after 2005-08-23 17:40 UTC is lost. You can and should abort rsa workunits starting with number 1834, as these are no longer existing in our database, and will be regenerated once we are back and running again, however, the time for the restart is not yet determined.

2005-08-25: PrimeGrid - Outage explained

2005-08-21: PrimeGrid - RSA Factoring Challenge Project Launched

The project for real scientific (and financial) value has been launched - the RSA Factoring Challenge RSA-640 sub-project has been started. The WUs are being generated at a slow rate to make sure the new project application is stable, but the work generation for message7 application has been turned off, at least for a while. More details will follow later, see RSA Labs website for challenge details.

2005-08-20: PrimeGrid - RSA Factoring Challenge Project Launched

2005-08-17: PrimeGrid - Web Pagesd

The web pages of the website has been updated with the latest versions. We are now the first public project to support newly created BOINC authentication method using password. Also, please respect our new forum moderator, Cori.

2005-08-16: PrimeGrid

2005-08-16: PrimeGrid - Web Pagesd

2005-08-16: PrimeGrid - Server Back Online

The server crashed last night, and is now back on. The cause for the crash is unknown.

2005-08-15: PrimeGrid

The server crashed last night, and is now back on. The cause for the crash is unknown.

2005-08-15: PrimeGrid - Server Back Online

The server crashed last night, and is now back on. The cause for the crash is unknown.

2005-08-09: PrimeGrid

I have enabled the possibility to reserve the place for the account before the account creation is opened. You will only receive email once you are granted the user account.

2005-08-03: PrimeGrid

The whole system has been moved to a new server. Let's hope it will not be hanging up as it was while we were configuring it.

2005-07-30: PrimeGrid

We have started moving Message@Home to the dedicated server, donated by Jim Baize. We are configuring the software now. Due to this move, no new work will be generated, as we want no problems to occur during transfer phase.

2005-07-24: PrimeGrid

The server will be shut down on Tuesday, 2005-07-26, and will return for full availability on Sunday, 2005-07-31. The server may return for short periods of time during the outage.

2005-07-24: PrimeGrid

The server will be shut down on Tuesday, 2005-07-26, and will return for full availability on Sunday, 2005-07-31. The server may return for short periods of time during the outage.

2005-07-21: PrimeGrid

The bug where AMD 2600+ had overwritten all hosts has been resolved. Your host info will be restored once your client contacts the server.

2005-07-21: PrimeGrid

The bug where AMD 2600+ had overwritten all hosts has been resolved. Your host info will be restored once your client contacts the server.

2005-07-19: PrimeGrid

Instant validation has been implemented: the validator is now run once any result is returned. The change is, that it only checks the WU affected, therefore reducing the load to the server significantly.

2005-07-19: PrimeGrid

2005-07-14: PrimeGrid

Message@Home server will be shut down on approx 07:00GMT, 2005-07-16, Saturday and is expected to return approx 10:00 GMT, 2005-07-19, Tuesday. There is nothing wrong with the system, this shutdown means that the administrator also has life :)

2005-07-14: PrimeGrid

2005-07-13: PrimeGrid

I have accidentally reset all team recent average credit to 0. The RAC will be updated once the team gets new credit. Total credit for teams is not lost.

2005-07-13: PrimeGrid

I have accidentally reset all team recent average credit to 0. The RAC will be updated once the team gets new credit. Total credit for teams is not lost.

2005-07-12: PrimeGrid

A little surprise for you all :) I opened account creation without any notice with user limit of 75. It is nice that you noticed, and the limit was reached quite fast. For others who did not manage to get in this time - there will be more such surprises. As for system status - we had no problems coping with registrations today, as they were not coming all the same time.

2005-07-12: PrimeGrid

2005-07-11: PrimeGrid

User count: 50; Host count: 60; Daily quota: 4/host; Workunit generation frequency: 1/5min (3 results/WU); Validator should be installed tomorrow. The start was very good, results are floating in, preliminary tests show that they are correct. The project state is expected to be changed to alpha tomorrow.

2005-07-11: PrimeGrid

2005-07-10: PrimeGrid

I have decided to clear some things out. User limit will be 50 just for now, as this is a pre-alpha test. We will open account creation to more users in the later stages, checking that the increased user count allows smooth operation of the system. Project's goal is not to decrypt specific string. It is just "a project for fun" and to study BOINC system, just like the Pirates were. All ex-Pirates are welcome, aye!

2005-07-10: PrimeGrid

2005-07-09: PrimeGrid

The project is announced and is set to go public. We have finally managed to sign the code for the applications. Account creation is scheduled to be opened at 2005-07-12 (Tuesday) at approx. 14:00 GMT with 50 user limit.

2005-07-09: PrimeGrid

The project is announced and is set to go public. We have finally managed to sign the code for the applications.

2005-07-07: PrimeGrid

Created RSS feed for news updates; Updated scheduler to support cross project ID updating at the server in order to be able to synchronyze it with other projects; Fixed missing email hash in scheduler replies. Current problems: User/global preferences are not sent back from the server; preferences fro other projects are not saved at the server; Application hasn't moved forward.

2005-07-07: PrimeGrid

2005-06-30: PrimeGrid

The fully-working standalone application has been prepared, though it is still not available for download as we still haven't compiled it with the BOINC code; the build process is failing. We will try to revert to earlier stable BOINC code base after the weekend. As a side note, we will be running only Windows version at least for a few weeks. If you do not have any Windows machines, please do not register, leave space for other BOINC participants with currently supported platforms.

2005-06-24: PrimeGrid

Read more about Message@Home in the message boards.

2005-06-21: PrimeGrid

Message@Home has been started!

1970-01-01: PrimeGrid - The Prime Time Challenge (Exploded)

The database has finally started to recover from the Challenge...and we have finished licking our wounds. It was one heck of an initiation for the new server. The one positive outcome is that an incredible amount of work was completed (over 3.3M results in 48 hours). Again, the participation greatly exceeded our expectations.Congratulations to SETI.Germany as the top team and zeitgeistmovie.com as the top individual. One new prime was found by Fish.Thank you to all who participated and especially for your patience. We very much appreciate the support. For more stats and information, please see this forum thread.

1970-01-01: PrimeGrid - The Prime Time Challenge (Exploded)

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