RSS
08-28-17, 08:52 AM
On 25 August 2017, 04:39:57 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=171362 by finding the mega prime: 171362*5^2400996-1 (http://primes.utm.edu/primes/page.php?id=123866) The prime is 1,678,230 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 57th overall. 73 k's now remain in the Riesel Base 5 Problem. The discovery was made by Frank Schwegler (Frank Schwegler (https://www.primegrid.com/show_user.php?userid=102603)) of the United States using an Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz with 16GB RAM running Microsoft Windows 7 Ultimate Edition. This computer took about 40 hours 12 minutes to complete the primality test using LLR. The prime was verified on 26 August 2017 04:44:17 UTC by Sam Omlotek (SamO (https://www.primegrid.com/show_user.php?userid=489518)) of the United States using an Intel(R) Core(TM) i5-2500S CPU @ 2.70GHz with 8GB RAM, running macOS Sierra. This computer took about 44 hours 35 minutes to complete the primality test using LLR. Sam is a member of the DONTPANIC (http://www.primegrid.com/team_display.php?teamid=8228) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-171362.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7582)
More... (http://www.primegrid.com/forum_thread.php?id=7582)