PrimeGrid is a BOINC project that comprises of a number of subprojects that search for prime numbers of specific forms: 321 primes, twin primes, Cullen primes, Woodall primes, and Proth primes.
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PrimeGrid Primes
| Prime | Digits | Type | Discovered | URL |
|---|---|---|---|---|
| 3*2^4235414-1 | 1,274,988 | 321 | March 23, 2008 | more info |
| 3752948*2^3752948-1 | 1,129,757 | Woodall | December 21, 2007 | more info |
| 236790*2^236790-1 | 712,818 | Woodall | August 13, 2007 | more info |
| 2013992*2^2013992-1 | 606,279 | Woodall | August 4, 2007 | more info |
| 2003663613*2^195000±1 | 58,711 | Twin | January 18, 2007 | more info |
PrimeGrid News
200M Cobblestones - May 1, 2010
Congratulations to SETI.Germany, the first team to reach 100M cobblestones at PrimeGrid...doubling their 100M cobblestone achievement in just over 9 months!!! :)
Mega Prime for 321 Prime Search - April 26, 2010
Finally!!! A significant find during a Challenge. :) On 24 Apr 2010 11:40:07 UTC, PrimeGrid's 321 Prime Search found another Mega Prime:3*2 6090515-1The prime is 1,833,429 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 17th overall. This is the second mega prime for the 3*2^n-1 form, and it is the third largest found mega-digit prime using LLR.The discovery was made by David Mumper (Mumps) of the United States using an AMD Quad-Core Opteron 2378 with 8 GB RAM running Linux. This computer took just over 15 hours 24 minutes to complete the primality test. David is a member of the SETI.USA team.Official news release and decimal representation of the prime to come later.
Earth Day Challenge - April 22, 2010
Turn the turbines into the wind and the solar panels towards the sun because in less than 13 hours, the Earth Day Challenge will begin. :) Come join us for an Earth Day (22 April) + 7 day Challenge on the 321 Prime Search (LLR) application. Even if you are not able to access "green" energy, check out the Earth Day discussion thread on other ways to offset your Challenge power consumption.For more information, please see this forum post.
Earth Day Challenge - April 15, 2010
Earth Day is less than a week away. Hopefully the wind turbines are spinning and the solar panels are soaking up the sunlight. Come join us for an Earth Day (22 April) + 7 day Challenge on the 321 Prime Search (LLR) application. Even if you are not able to access "green" energy, check out the Earth Day discussion thread on other ways to offset your Challenge power consumption.For more information, please see this forum post.
First ever AP26 Found! - April 12, 2010
The search is over. A World Record AP26 (Arithmetic Progression of 26 primes) has been found. The finder is Benoãt Perichon [AF>HFR>RR] Jim PROFIT) of France. He is a member of the L'Alliance Francophone team.The AP26 progression is written as 43142746595714191+23681770*23#*n for n=0..25. It was found by a PS3 running Linux. For more details on this find, please see this forum post.Congratulations to everyone who participated in the AP26 Search. It has been a very challenging and rewarding project. Also, a special thanks to all the programmers who ported AP26 making it the most accessible project at PrimeGrid.