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08-21-12, 08:31 AM
On 8 Aug 2012, 8:58:58 UTC, PrimeGrid’s Generalized Fermat Prime Search found the largest known Generalized Fermat mega prime: 475856^524288+1 (http://primes.utm.edu/primes/page.php?id=108818) The prime is 2,976,633 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for Generalized Fermat primes and 11th overall. The discovery was made by Masashi Kumagai (ragnarag (http://www.primegrid.com/show_user.php?userid=151189)) of Japan using an NVIDIA GeForce GTS 450 in an AMD FX(tm)-8150 CPU with 8GB RAM, running 64 bit Windows 7. This GPU took 7 hours 47 minutes to probable prime (PRP) test with GeneferCUDA. Masashi Kumagai is a member of the Team 2ch (http://www.primegrid.com/team_display.php?teamid=194) team. The prime was verified by Jason Preszler (Jason Preszler (http://www.primegrid.com/show_user.php?userid=46245)) of the United States using an Intel Core i7-2600 CPU @ 3.40GHz with 12GB RAM, running 64 bit LINUX . This computer took 46 hours 55 minutes to probable prime (PRP) test with GenefX64. Jason is a member of the Turan@BOINC (http://www.primegrid.com/team_display.php?teamid=1995) team. For more details, please see the official announcement (http://www.primegrid.com/download/GFN-475856_524288.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=4521)
More... (http://www.primegrid.com/forum_thread.php?id=4521)