AMDave
08-21-2020, 01:09 AM
SR5 Mega Prime!
On 13 August 2020, 17:09:10 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=109838 by finding the mega prime: 109838*5^3168862-1 (https://primes.utm.edu/primes/page.php?id=131064)The prime is 2,214,945 digits long and enters Chris Caldwell's “The Largest Known Primes Database” (https://primes.utm.edu/primes) ranked 72ns overall and is the largest known base 5 prime. 62 k’s now remain in the Riesel Base 5 problem.The discovery was made by Erik Veit (zombie67 [MM] (https://www.primegrid.com/show_user.php?userid=4065)) of the United States AMD Ryzen Threadripper 3970X 32-Core Processor with 63GB RAM, running Linux Mint. This computer took about 6 hours, 14 minutes to complete the primality test using LLR. Erik Veit is a member of the SETI.USA (https://www.primegrid.com/team_display.php?teamid=189) team.The prime was verified on 13 August 2020, 22:53:05 UTC by Frederik Schiøler (Soulfly (https://www.primegrid.com/show_user.php?userid=71735)) of Denmark using an Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz with 1GB RAM, running Linux Ubuntu. This computer took about 11 hours, 52 minutes to complete the primality test using LLR. Frederik Schiøler is a member of the Antarctic Crunchers (https://www.primegrid.com/team_display.php?teamid=8398) team.For more details, please see the official announcement (https://www.primegrid.com/download/SR5-109838.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=9272)
On 13 August 2020, 17:09:10 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=109838 by finding the mega prime: 109838*5^3168862-1 (https://primes.utm.edu/primes/page.php?id=131064)The prime is 2,214,945 digits long and enters Chris Caldwell's “The Largest Known Primes Database” (https://primes.utm.edu/primes) ranked 72ns overall and is the largest known base 5 prime. 62 k’s now remain in the Riesel Base 5 problem.The discovery was made by Erik Veit (zombie67 [MM] (https://www.primegrid.com/show_user.php?userid=4065)) of the United States AMD Ryzen Threadripper 3970X 32-Core Processor with 63GB RAM, running Linux Mint. This computer took about 6 hours, 14 minutes to complete the primality test using LLR. Erik Veit is a member of the SETI.USA (https://www.primegrid.com/team_display.php?teamid=189) team.The prime was verified on 13 August 2020, 22:53:05 UTC by Frederik Schiøler (Soulfly (https://www.primegrid.com/show_user.php?userid=71735)) of Denmark using an Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz with 1GB RAM, running Linux Ubuntu. This computer took about 11 hours, 52 minutes to complete the primality test using LLR. Frederik Schiøler is a member of the Antarctic Crunchers (https://www.primegrid.com/team_display.php?teamid=8398) team.For more details, please see the official announcement (https://www.primegrid.com/download/SR5-109838.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=9272)