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Thread: Yet Another GFN-131072 Mega Prime!

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    Yet Another GFN-131072 Mega Prime!

    On 4 June 2017, 04:02:39 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

    46413358^131072+1

    The prime is 1,004,883 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 23rd for Generalized Fermat primes and 235th overall.

    The discovery was made by Sagi Iltus (sagiil) of Israel using an Intel(R) Xeon(R) E5-2673 v3 CPU at 2.40GHz with 8GB RAM, running Linux. This CPU took about 7 hours 4 minutes to probable prime (PRP) test with Genefer.

    The prime was verified on 7 June 2017, 18:18:37 UTC by Dirk Broer (Dirk Broer) of the British Virgin Islands using an AMD Athlon(TM) 5350 APU with 16GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 4 hours 1 minute to probable prime (PRP) test with GeneferOCL2. Dirk is a member of the AMD Users team.

    The PRP was confirmed prime by an Intel(R) Xeon (R) E5-2670 CPU CPU @ 2.60GHz with 32GB RAM, running Linux. This computer took about 15 hours 21 minutes to complete the primality test using LLR.

    For more details, please see the official announcement.


  2. #2
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    The Athlon 5350,
    The ASUS AM1I-A where it's in,
    The 16 Gb RAM.


    Last edited by Dirk Broer; 06-08-2017 at 08:10 AM.


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    NeoGen is offline AMD Users Alchemist Moderator
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  4. #4
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    It shows that you can do serious work on an AM1 system anyway. Look at the hardware those other two had.


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    Nice work Dirk. Keep plugging on and keep the cache at 0 days!

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    Thanks Vaughan. Already back in Oz, or still in Europe?


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    Cool beans Dirk!!!! :-)

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    Nice one Dirk!

  9. #9
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    I'm still in Italy, we went to the Colosseum here in Rome today. It was a hot walk. Visiting Trevi Fountain and Spanish Steps tomorrow.

    My computers are mostly having a holiday too. I'm saving heaps on electricity; in fact the solar PV is actually running in credit for the first time. We "made" 87 cents last month! Woot.

  10. #10
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    Quote Originally Posted by vaughan View Post
    in fact the solar PV is actually running in credit for the first time. We "made" 87 cents last month! Woot.
    Either the rates are rotten, or you need more solar cells...


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