AMDave
03-11-2020, 10:04 AM
SR5 Mega Prime!
On 5 March 2020, 14:40:22 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=35816 by finding the mega prime:35816*5^2945294-1 (https://primes.utm.edu/primes/page.php?id=130732)The prime is 2,058,677 digits long and enters Chris Caldwell's “The Largest Known Primes Database” (https://primes.utm.edu/primes) ranked 73rd overall and is the largest known base 5 prime. 66 k’s now remain in the Riesel Base 5 problem.The discovery was made by Pavel Atnashev (Pavel Atnashev (https://www.primegrid.com/show_user.php?userid=914937)) of Russia using an Intel(R) Xeon(R) E5-2660 v2 CPU @ 2.20GHz with 8GB RAM running Linux. This computer took about 3 hours 56 minutes to complete the primality test using LLR. Pavel Atnashev is a member of the Ural Federal University (https://www.primegrid.com/team_display.php?teamid=8426) team.The prime was verified on 6 March 2020, 21:41:36 UTC by John Hall (JH30895 (https://www.primegrid.com/show_user.php?userid=53449)) of the United States using an Intel(R) Xeon(R) W-3245 CPU @ 3.20GHz with 385GB RAM, running Darwin 19.3.0. This computer took about 1 day, 7 hours 33 minutes to complete the primality test using LLR. John Hall is a member of the Antarctic Crunchers (http://www.primegrid.com/team_display.php?teamid=8398) team.For more details, please see the official announcement (https://www.primegrid.com/download/SR5-35816.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=9078)
On 5 March 2020, 14:40:22 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=35816 by finding the mega prime:35816*5^2945294-1 (https://primes.utm.edu/primes/page.php?id=130732)The prime is 2,058,677 digits long and enters Chris Caldwell's “The Largest Known Primes Database” (https://primes.utm.edu/primes) ranked 73rd overall and is the largest known base 5 prime. 66 k’s now remain in the Riesel Base 5 problem.The discovery was made by Pavel Atnashev (Pavel Atnashev (https://www.primegrid.com/show_user.php?userid=914937)) of Russia using an Intel(R) Xeon(R) E5-2660 v2 CPU @ 2.20GHz with 8GB RAM running Linux. This computer took about 3 hours 56 minutes to complete the primality test using LLR. Pavel Atnashev is a member of the Ural Federal University (https://www.primegrid.com/team_display.php?teamid=8426) team.The prime was verified on 6 March 2020, 21:41:36 UTC by John Hall (JH30895 (https://www.primegrid.com/show_user.php?userid=53449)) of the United States using an Intel(R) Xeon(R) W-3245 CPU @ 3.20GHz with 385GB RAM, running Darwin 19.3.0. This computer took about 1 day, 7 hours 33 minutes to complete the primality test using LLR. John Hall is a member of the Antarctic Crunchers (http://www.primegrid.com/team_display.php?teamid=8398) team.For more details, please see the official announcement (https://www.primegrid.com/download/SR5-35816.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=9078)