AMDave
01-25-2020, 04:32 PM
World Record Fermat Divisor Found!
On 22 January 2020, 15:00:58 UTC, PrimeGrid's Fermat Divisor Search found the Mega Prime:13*2^5523860+1 Divides F(5523858) (http://primes.utm.edu/primes/page.php?id=130274)The prime is 1,662,849 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 115th overall. This is a world record for prime Fermat divisors, and it is also ranked 4th for “weighted” prime Fermat divisors.The discovery was made by Scott Brown (Scott Brown (https://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz with 16GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 39 minutes to complete the primality test using multithreaded LLR. Scott is a member of the Aggie The Pew (https://www.primegrid.com/team_display.php?teamid=2280) team.The prime was verified on 22 January 2020, 15:11:39 UTC by Stefan Larsson (288larsson (https://www.primegrid.com/show_user.php?userid=58815)) of Sweden using an Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz with 8GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 46 minutes to complete the primality test using multithreaded LLR. Stefan is a member of the Sicituradastra. (https://www.primegrid.com/team_display.php?teamid=1596) team.For more details, please see the official announcement (http://www.primegrid.com/download/DIV-F5523858.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=8997)
On 22 January 2020, 15:00:58 UTC, PrimeGrid's Fermat Divisor Search found the Mega Prime:13*2^5523860+1 Divides F(5523858) (http://primes.utm.edu/primes/page.php?id=130274)The prime is 1,662,849 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 115th overall. This is a world record for prime Fermat divisors, and it is also ranked 4th for “weighted” prime Fermat divisors.The discovery was made by Scott Brown (Scott Brown (https://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz with 16GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 39 minutes to complete the primality test using multithreaded LLR. Scott is a member of the Aggie The Pew (https://www.primegrid.com/team_display.php?teamid=2280) team.The prime was verified on 22 January 2020, 15:11:39 UTC by Stefan Larsson (288larsson (https://www.primegrid.com/show_user.php?userid=58815)) of Sweden using an Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz with 8GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 46 minutes to complete the primality test using multithreaded LLR. Stefan is a member of the Sicituradastra. (https://www.primegrid.com/team_display.php?teamid=1596) team.For more details, please see the official announcement (http://www.primegrid.com/download/DIV-F5523858.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=8997)