PrimeGridsMegaPrimeSearch.PDF

PrimeGrid’s Mega Prime Search On 28 April 2017 , 04:22:38 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime: 3391818 805*2 +1 The prime is 1,021,042 digits long and will enter Chris Caldwells “The Largest Known Primes th Database” (/primes) ranked 204 overall. The discovery was made by Reiner Elgetz of Germany using an AMD Ryzen 7 1700 with 16GB RAM, running Linux. This computer took about 21 minutes to complete the primality test using LLR with 8 threads. Reiner is a member of the Planet 3DNow! team. The prime was verified on 28 April 2017 13:44:43 UTC, by William Finn of the United States using an Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz with 24GB RAM running Microsoft Windows 10 Professional Edition . This computer took about 1 hour 36 minutes to complete the primality test using LLR. Credits for the discovery are as follows: 1. Reiner Elgetz (Germany), discoverer 2. PrimeGrid, et al. 3. Srsieve, sieving program developed by Geoff Reynolds 4. PSieve, sieving program developed by Ken Brazier and Geoff Reynolds 5. LLR, primality program developed by Jean Penné 6. OpenPFGW, a primality program developed by Chris Nash Jim Fougeron with maintenance and improvements by Mark Rodenkirch Entry in The Largest Known Primes Database can be found here: /primes/page.php?id=123322 OpenPFGW, a primality program developed by Chris Nash Jim Fougeron, was used to check for Fermat Number divisibility (including generalized and extended). For more information about Fermat and generalized Fermat Number divisors, please see Wilfrid Kellers sites: • /fermat.html • /GFNfacs.html Using a single PC would h