About
PrimeGrid's primary goal is to bring the excitement of prime finding to the "everyday" computer user. By simply
downloading and installing BOINC and attaching to the PrimeGrid project,
participants can choose from a variety of prime forms to search. With a little patience, you may find a large or even record
breaking prime and enter into Chris Caldwell's The Largest Known Primes Database as
a Titan!
PrimeGrid's secondary goal is to provide relevant educational materials about primes. Additionally, we wish to contribute to the
field of mathematics.
Lastly, primes play a central role in the cryptographic systems which are used for computer security. Through the study of prime
numbers it can be shown how much processing is required to crack an encryption code and thus to determine whether current
security schemes are sufficiently secure. PrimeGrid is currently running several sub-projects:
- 321 Prime Search: searching for
mega primes of the form 3·2n±1.
- AP26 Search: searching for an Arithmetic Progression of 26 primes.
- Cullen-Woodall Search: searching for
mega primes of forms n·2n+1 and
n·2n−1.
- Prime Sierpinski Project: helping Prime Sierpinski Project solve
the Prime Sierpinski Problem.
- Proth Prime Search: searching for primes of the form k·2n+1.
- Sophie Germain Prime Search: searching for primes p and 2p+1.
- Seventeen or Bust: helping to solve the
Sierpinski Problem.
- Twin Prime Search: searching for
gigantic
twin primes of the form k·2n+1 and
k·2n−1.
Recent Significant Primes
On 07 Dec 2009, 08:32:59 UTC, PrimeGrid's PRPNet found the largest known generalized Woodall prime:
563528·13563528-1
The discovery was made by Lennart Vogel of Sweden using an Intel Q6600 @ 2.4GHz with 4 GB RAM running Linux. For more details, please see the official
announcement. Other significant primes
Newly reported primes8775*2^488889+1 (roadrunner_gs); 9107*2^488607+1 (Scott Brown); 2745*2^488502+1 (flowerysong); 1971*2^488723+1 (roadrunner_gs); 7617*2^488654+1 (lennart SM5YMT); 2037*2^487740+1 (SETI.USA Cluster); 3305*2^488579+1 (Scott Brown); 3179*2^488175+1 (lennart SM5YMT); 7875*2^488615+1 (flowerysong); 9495*2^488262+1 (urban_trail); 5139*2^488205+1 (roadrunner_gs); 5615*2^487537+1 (Kevint); 1657*2^488340+1 (Scott Brown); 506694327135*2^666669-1 (gachagachacute@jisaku); 4019*2^488301+1 (Vato); 9575*2^488285+1 (lennart SM5YMT); 6687*2^488264+1 (lennart SM5YMT); 75*2^705688+1 (lunarcom); 9021*2^488131+1 (lennart SM5YMT); 7743*2^488028+1 (Lumiukko) Last 24 hoursTop members by work done in the last 24 hours | Top teams by work done in the last 24 hours |
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PrimeGrid User of the Day
  morse [E.R.] - BOINC.ItalyMy name is Andrea. I am 23 years.
I study telecomunications enginnering at Modena University.
My hobbies are computer and...
News 
The Year of the Tiger Challenge
2010-02-07 14:50 UTC
One week till the start of the 2010 Challenge Series with the Year of the Tiger. A 3 day (14-17 Feb) Challenge is being offered on PrimeGrid's Proth Prime Search (LLR). Come join us as we stalk the primes. Application builds are available for Mac, Linux, and Windows. For more information, please see this forum thread.
54 digit factor to F14!!!
2010-02-04 18:45 UTC
GIMPS has found another Fermat factor, a 54 digit factor to F14!!! What makes this unique and exciting is that it is the first factor for F14. It was found by Tapio Rajala of Finland. For more information on this discovery, see this mersenne forum thread. For more information about the factoring status of Fermat numbers, please see Wilfrid Keller's Prime factors of Fermat numbers site.
The Year of the Tiger Challenge
2010-02-03 02:30 UTC
We are kicking off the 2010 Challenge Series with the Year of the Tiger Challenge which just so happens to coincide with Valentine's Day in the West. The Tiger is the third sign in the Chinese Zodiac cycle, and it is a sign of fearlessness. It is considered incredibly brave, evidenced by its willingness to engage in battle. So whether it's your love of Tigers or love of primes, please come join us in an East & West fearless attack on Proth Primes.
A 3 day (14-17 Feb) Challenge is being offered on PrimeGrid's Proth Prime Search (LLR). Builds are available for Mac, Linux, and Windows. For more information, please see this forum thread.
New AP25 Found
2010-02-02 04:20 UTC
A new AP25 (Arithmetic Progression of 25 primes) has been found. It is the 11th discovered. The finder is Jan Stenzel (Jan Stenzel) of Poland. He is a member of the BOINC@Poland team.
The AP25 progression is written as 49644063847333931+7851809 *23#*n for n=0..24. It was found by an Intel Core i7 860 @ 2.80GHz running 64 bit Windows 7. For more details on this find and the AP26 search, please see this forum post.
Tour de Primes 2010
2010-02-01 00:00 UTC
The Tour de Primes begins. Come join us in laid-back competition in tribute to the number 2...the first prime and the only even prime. The prizes are simple colored jerseys . Yellow for the most primes, Green for the highest prime score, and Checkered for the most primes on 17 Feb.
No pressure or stress other than what you put on yourself. :) For more information, please see Tour de Primes 2010.
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