AMDave
02-09-2014, 04:32 PM
Deja Vu: World Record SR5 Discovery
On 6 February 2014, 16:02:23 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=22934 by finding the mega prime: 22934*5^1536762-1 (http://primes.utm.edu/primes/page.php?id=117082)The prime is 1,074,155 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 61st overall. This is the largest known base 5 mega prime. 86 k's now remain in the Riesel Base 5 Problem.The discovery was made by Keishi Toda (yuyusuke@jisaku (http://www.primegrid.com/show_user.php?userid=185281)) of Japan using an Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz with 14GB RAM running Microsoft Windows 7 Home Premium. This computer took about 9 hours and 2 minutes to complete the primality test using LLR. Keishi is a member of the Team 2ch (http://www.primegrid.com/team_display.php?teamid=194) team.This is the second world record base 5 SR5 mega prime Keishi has discovered in approximately one week's time!The prime was verified on 2 February 2014 0:15:42 UTC, by Scott Brown (Scott Brown (http://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz with 4 GB RAM running Microsoft Windows 7 Enterprise. This computer took about 21 hours and 34 minutes to complete the primality test using LLR. Scott is a member of the Duke University (http://www.primegrid.com/team_display.php?teamid=154) team.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-22934.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5521)
On 6 February 2014, 16:02:23 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=22934 by finding the mega prime: 22934*5^1536762-1 (http://primes.utm.edu/primes/page.php?id=117082)The prime is 1,074,155 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 61st overall. This is the largest known base 5 mega prime. 86 k's now remain in the Riesel Base 5 Problem.The discovery was made by Keishi Toda (yuyusuke@jisaku (http://www.primegrid.com/show_user.php?userid=185281)) of Japan using an Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz with 14GB RAM running Microsoft Windows 7 Home Premium. This computer took about 9 hours and 2 minutes to complete the primality test using LLR. Keishi is a member of the Team 2ch (http://www.primegrid.com/team_display.php?teamid=194) team.This is the second world record base 5 SR5 mega prime Keishi has discovered in approximately one week's time!The prime was verified on 2 February 2014 0:15:42 UTC, by Scott Brown (Scott Brown (http://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz with 4 GB RAM running Microsoft Windows 7 Enterprise. This computer took about 21 hours and 34 minutes to complete the primality test using LLR. Scott is a member of the Duke University (http://www.primegrid.com/team_display.php?teamid=154) team.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-22934.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5521)