RSS
08-01-18, 10:22 AM
On 28 July 2018, 11:28:58 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=66916 by finding the mega prime: 66916*5^2628609-1 (https://primes.utm.edu/primes/page.php?id=125507)The prime is 1,837,324 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 59th overall and is the largest known base 5 prime. 70 k's now remain in the Riesel Base 5 Problem.The discovery was made by Honza Cholt (Honza (https://www.primegrid.com/show_user.php?userid=352)) of the Czech Republic using an Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz with 32 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 4 hours 35 minutes to complete the primality test using multithreaded LLR. Honza is a member of the Czech National Team (http://www.primegrid.com/team_display.php?teamid=46).The prime was verified on 29 July 2018, 15:45:07 UTC by James Krauss (Grebuloner (https://www.primegrid.com/show_user.php?userid=49572)) of the United States using an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 5 hours 38 minutes to complete the primality test using multithreaded LLR. James is a member of The Knights Who Say Ni! (http://www.primegrid.com/team_display.php?teamid=16) team.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-66916.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=8164)
More... (http://www.primegrid.com/forum_thread.php?id=8164)