RSS
09-02-17, 01:43 PM
On 29 August 2017, 14:15:23 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:919444^1048576+1 (http://primes.utm.edu/primes/page.php?id=123875)The prime is 6,253,210 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for Generalized Fermat primes and 12th overall. This is the first Generalized Fermat prime found for n=20, the second-largest prime found by PrimeGrid, and the second-largest non-Mersenne prime.The discovery was made by Sylvanus A. Zimmerman (Van Zimmerman (https://www.primegrid.com/show_user.php?userid=168418)) of the United States using a Nvidia GeForce GTX 1060 in an Intel(R) Xeon(R) E3-1225 v3 CPU at 3.20GHz with 8GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 4 hours 43 minutes to probable prime (PRP) test with GeneferOCL4. Sylvanus is a member of the Aggie The Pew (http://www.primegrid.com/team_display.php?teamid=2280) team.Double-checker information will be announced once available.The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional Edition. This computer took about 3 days, 23 hours, 53 minutes to complete the primality test using multithreaded LLR.For more details, please see the official announcement (http://www.primegrid.com/download/GFN-919444_1048576.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7597)
More... (http://www.primegrid.com/forum_thread.php?id=7597)