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11-10-15, 10:28 PM
On 9 Nov 2015, 18:02:51 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:42654182^131072+1 (https://primes.utm.edu/primes/page.php?id=120532)The prime is 1,000,075 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 14th for Generalized Fermat primes and 143rd overall. Of note, this find appears to be the first Titanic prime (>= 1000 digits) found using fixed-point numbers.The discovery was made by Andrew M. Farrow (Nortech (http://www.primegrid.com/show_user.php?userid=61946)) of Australia using an NVIDIA GeForce GTX 960 in an Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz with 4GB RAM running Linux. This GPU took about 47 minutes to probable prime (PRP) test with GeneferOCL2.The prime was verified by Patrick Schöfer (pschoefer (http://www.primegrid.com/show_user.php?userid=845)) of Germany using an NVIDIA GeForce GTX 660 Ti in an Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16GB RAM running Windows 7 Professional. This computer took about 1 hour 2 minutes to probable prime (PRP) test with GeneferOCL2. Patrick is a member of the SETI.Germany (http://www.primegrid.com/team_display.php?teamid=11) team.For more details, please see the official announcement (http://www.primegrid.com/download/GFN-42654182_131072.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6522)
More... (http://www.primegrid.com/forum_thread.php?id=6522)