Free-DC
11-19-2011, 07:45 PM
On 19 Nov 2011 14:03:58, PrimeGrid's PRPNet found the largest known Generalized Fermat mega prime: 75898^524288+1The prime is 2,558,647 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for Generalized Fermat Primes (http://primes.utm.edu/top20/page.php?id=12) and 13th overall. This is the first prime found at N=524288.The discovery was made by Michael Goetz of the United States using an NVIDIA GeForce GTX 460 in an Intel Core2 Q6600 @ 2.4GHz system with 8GB RAM, running 64 bit Windows 7. This GPU took just under 5 hours to probable prime (PRP) test with GenefCUDA. The CPU completed the primality test using pfgw64 in a little over 8 days! Michael is a member of the SETI.USA (http://www.primegrid.com/team_display.php?teamid=189) team.More details to come...
More... (http://www.primegrid.com/forum_thread.php?id=3761)
More... (http://www.primegrid.com/forum_thread.php?id=3761)