Free-DC
08-25-2016, 01:52 PM
On 20 August 2016, 16:21:09 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=180062 by finding the mega prime: 180062*5^2249192-1 (https://primes.utm.edu/primes/page.php?id=122064)The prime is 1,572,123 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 48th overall. This is the largest known base 5 mega prime. 74 k's now remain in the Riesel Base 5 Problem.The discovery was made by Stefan Larsson (288larsson (http://www.primegrid.com/show_user.php?userid=58815)) of Sweden using an Intel(R) Core(TM) i7-5775C CPU @ 3.30GHz with 8GB RAM running Linux. This computer took about 14 hours 3 minutes to complete the primality test using LLR. Stefan is a member of the Sicituradastra. (http://www.primegrid.com/team_display.php?teamid=1596) team.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-180062.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6977)
More... (http://www.primegrid.com/forum_thread.php?id=6977)