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11-27-16, 12:46 PM
On 24 November 2016, 03:05:38 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime: 2042774^262144+1 (http://primes.utm.edu/primes/page.php?id=122532) The prime is 1,654,187 digits long and enters Chris Caldwell's The Largest Known Primes Database (https://primes.utm.edu/primes) ranked 5th for Generalized Fermat primes and 47th overall. The discovery was made by Tsuyoshi Ohsugi (motsu (https://www.primegrid.com/show_user.php?userid=379809)) of Japan using an NVIDIA GeForce GTX 750 Ti in an AMD Phenom(tm) II X6 1065T CPU with 12GB RAM, running Microsoft Windows 10 Professional. This GPU took about 1 hour 19 minutes to probable prime (PRP) test with GeneferOCL3. Tsuyoshi is a member of the Gridcoin (http://www.primegrid.com/team_display.php?teamid=4469) team. The prime was verified on 24 November 2016, 08:03:02 UTC by Michael Mamanakis (Michael Mamanakis (https://www.primegrid.com/show_user.php?userid=33592)) of the United States using an NVIDIA GeForce GTX 1080 in an Intel(R) Xeon(R) CPU E5-1603 @ 2.80GHz with 32GB RAM, running Microsoft Windows 7 Enterprise Edition. This GPU took about 25 minutes to probable prime (PRP) test with GeneferOCL4. The PRP was confirmed prime by an Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz with 12GB RAM, running Windows 7 Professional. This computer took about 20 hours 36 minutes to complete the primality test using LLR. For more information, please see the official announcement (https://www.primegrid.com/download/GFN-2042774_262144.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7142)
More... (http://www.primegrid.com/forum_thread.php?id=7142)