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Thread: PrimeGrid News

  1. #1
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    PrimeGrid News

    PRPNet September Challenge
    Tolkien Week ChallengeAnnounced is a PRPNet challenge at the Wieferich prime search project from the 19th until the 26th of September. Come and celebrate Tolkien Week over at the Shire with Bilbo and Frodo Baggins. Who knows, YOU might discover the One Ring (A = 0).Discussion and more information can be found here: 2015 PRPNet September Challenge.“All we have to decide is what to do with the time that is given us.” ? J.R.R. Tolkien, The Fellowship of the Ring

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    PrimeGrid: PPS Mega Prime!
    On 9 February 2016, 02:47:35 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime:

    275*2^3585539+1

    The prime is 1,079,358 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 104th overall.

    The discovery was made by Tyler Bredl (1998golfer ) of the United States using an Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz with 60GB RAM, running Linux. This computer took about 3 hour 3 minutes to complete the primality test using LLR. Tyler is a member of the Aggie The Pew team.

    The prime was verified on 9 February 2016, 22:55:34 UTC, by Andreas Mueller (Andreas ) of Germany using an Intel(R) Xeon(R) CPU E5620 @ 2.40GHz with 16GB RAM, running Linux. This computer took about 3 hours 51 minutes to complete the primality test using LLR.

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    On 16 February 2016, 16:45:20 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

    1415198^262144+1

    The prime is 1,612,400 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 5th for Generalized Fermat primes and 43rd overall.

    The discovery was made by Frank Matillek (boss) of Germany using an NVIDIA GeForce GTX 660 Ti in an Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz with 4GB RAM, running Windows 7 Ultimate. This GPU took about 53 minutes to probable prime (PRP) test with GeneferOCL3. Frank is a member of the SETI.Germany team.

    The prime was verified on 16 February 2016, 17:01:20 UTC by Alan Kong (Wingless Wonder) of the United States using an NVIDIA GeForce GTX Titan Black in an Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz with 32GB RAM, running Windows 10 Professional. This GPU took 30 minutes to probable prime (PRP) test with GeneferOCL3. Alan is a member of the AMD Users team.

    For more details, please see the official announcement.
    Last edited by Dirk Broer; 02-25-2016 at 09:58 AM.


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