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04-05-18, 04:51 PM
On 3 April 2018, 15:55:55 UTC, PrimeGrid’s Extended Sierpinski Problem Prime Search project found the Mega Prime:193997*2^11452891+1 (http://primes.utm.edu/primes/page.php?id=124564)The prime is 3,447,670 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 23th overall. This find eliminates k=193997; 10 k's remain in the Extended Sierpinski Problem. The discovery was made by Tom Greer (tng* (https://www.primegrid.com/show_user.php?userid=66603)) of the United States using an Intel(R) Xeon(R) E5-2620 v3 CPU @ 2.40GHz with 16GB RAM, running Microsoft Windows 10. This computer took about 3 hours 45 minutes to complete the primality test using multithreaded LLR. Tom is a member of the Sicituradastra. (http://www.primegrid.com/team_display.php?teamid=1596) team.The prime was verified on 4 April 2018, 00:17:20 UTC by Gary Bauer (GDB (https://www.primegrid.com/show_user.php?userid=119185)) of the United States using an Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz with 16GB RAM, running Microsoft Windows 10. This computer took about 2 hours 25 minutes to complete the primality test using multithreaded LLR. For more details, please see the official announcement (http://www.primegrid.com/download/ESP-193997.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7981)
More... (http://www.primegrid.com/forum_thread.php?id=7981)