AMDave
02-02-2014, 10:38 PM
Another Record SR5 Prime!
On 31 January 2014, 9:53:06 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=178658 by finding the mega prime: 178658*5^1525224-1 (http://primes.utm.edu/primes/page.php?id=117045)The prime is 1,066,092 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. 87 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 19 hours and 59 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.The prime was verified on 2 February 2014 0:15:42 UTC, by smmistak (http://www.primegrid.com/show_user.php?userid=211736) of the United States using an Intel(R) Core(TM) i7-2700K CPU @ 3.50GHz with 16 GB RAM running Microsoft Windows 7 Ultimate. This computer took about 59 hours and 27 minutes to complete the primality test using LLR.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-178658.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5508)
On 31 January 2014, 9:53:06 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=178658 by finding the mega prime: 178658*5^1525224-1 (http://primes.utm.edu/primes/page.php?id=117045)The prime is 1,066,092 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. 87 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 19 hours and 59 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.The prime was verified on 2 February 2014 0:15:42 UTC, by smmistak (http://www.primegrid.com/show_user.php?userid=211736) of the United States using an Intel(R) Core(TM) i7-2700K CPU @ 3.50GHz with 16 GB RAM running Microsoft Windows 7 Ultimate. This computer took about 59 hours and 27 minutes to complete the primality test using LLR.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-178658.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5508)