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07-25-12, 02:12 PM
On 20 Jun 2012, 4:26:47 UTC, PrimeGrid’s Generalized Fermat Prime Search found the largest known Generalized Fermat mega prime: 356926^524288+1 (http://primes.utm.edu/~caldwell/primes/page.php?id=108492) The prime is 2,911,151 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 (bherbihyewrbg (http://www.primegrid.com/show_user.php?userid=121871)) of Japan using an NVIDIA GeForce GT 640M in an Intel Core i7-3610QM CPU @ 2.30GHz with 8GB RAM, running 64 bit Windows 7 Professional. This GPU took 17 hours 49 minutes to probable prime (PRP) test with GeneferCUDA. (bherbihyewrbg) is a member of the Team 2ch (http://www.primegrid.com/team_display.php?teamid=194) team. The prime was verified by Tim McArdle (Bauerwulf (http://www.primegrid.com/show_user.php?userid=136025)) of the United States using an Intel Core i7-2600 CPU @ 3.40GHz with 8GB RAM, running 64 bit Windows Server 2008 . This computer took 43 hours 46 minutes to probable prime (PRP) test with GenefX64. Tim is a member of the Don't Panic Labs (http://www.primegrid.com/team_display.php?teamid=3919) team. For more details, please see the official announcement (http://www.primegrid.com/download/GFN-356926_524288.pdf).

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