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02-19-18, 07:36 AM
On 15 February 2018, 02:15:40 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:4246258^262144+1 (https://primes.utm.edu/primes/page.php?id=124353)The prime is 1,737,493 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 7th for Generalized Fermat primes and 57th overall.The discovery was made by Rob Gahan (Robish (https://www.primegrid.com/show_user.php?userid=126266)) of Ireland using an NVIDIA GeForce Titan X in an Intel(R) Core(TM) i7-5930K CPU at 3.50GHz with 32GB RAM, running Windows 10 Core Edition. This GPU took about 23 minutes to probable prime (PRP) test with GeneferOCL3. Rob is a member of the Storm (http://www.primegrid.com/team_display.php?teamid=3983) team.The prime was verified on 15 February 2018, 02:18:23 by Daniel Frużyński ([B@P] Daniel (https://www.primegrid.com/show_user.php?userid=123596)) of Poland using an NVIDIA GeForce GTX 1070 GPU in an Intel(R) Core(TM) i7-2600K CPU at 3.40GHz with 16GB RAM, running Windows 10 Professional Edition. This GPU took about 20 minutes to probable prime (PRP) test with GeneferOCL3. Daniel is a member of the BOINC@Poland (http://www.primegrid.com/team_display.php?teamid=2) team.The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional. This computer took about 4 hours 37 minutes to complete the primality test using LLR.For more details, please see the official announcement (http://www.primegrid.com/download/GFN-4246258_262144.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7871)
More... (http://www.primegrid.com/forum_thread.php?id=7871)