AMDave
04-27-2014, 05:16 PM
Yet another SR5 prime discovered!
On 25 April 2014, 21:06:16 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=326834 by finding the mega prime: 326834*5^1634978-1 (http://primes.utm.edu/primes/page.php?id=117737)The prime is 1,142,807 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 56th overall. This is the largest known base 5 mega prime. 82 k's now remain in the Riesel Base 5 Problem.The discovery was made by Scott Brown (Scott Brown (http://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz with 6GB RAM running Microsoft Windows 7 Home Premium. This computer took about 44 hours and 32 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.The prime was verified on 26 April 2014 15:50:21 UTC, by Alejandro Kurtz (Alejandro (http://www.primegrid.com/show_user.php?userid=126647)) of Spain using an Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz with 5.5 GB RAM running Microsoft Windows 7 Professional. This computer took about 13 hours and 28 minutes to complete the primality test using LLR. Alejandro is a member of the CANAL@Boinc (http://www.primegrid.com/team_display.php?teamid=54) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-326834.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5669)
On 25 April 2014, 21:06:16 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=326834 by finding the mega prime: 326834*5^1634978-1 (http://primes.utm.edu/primes/page.php?id=117737)The prime is 1,142,807 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 56th overall. This is the largest known base 5 mega prime. 82 k's now remain in the Riesel Base 5 Problem.The discovery was made by Scott Brown (Scott Brown (http://www.primegrid.com/show_user.php?userid=1178)) of the United States using an Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz with 6GB RAM running Microsoft Windows 7 Home Premium. This computer took about 44 hours and 32 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.The prime was verified on 26 April 2014 15:50:21 UTC, by Alejandro Kurtz (Alejandro (http://www.primegrid.com/show_user.php?userid=126647)) of Spain using an Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz with 5.5 GB RAM running Microsoft Windows 7 Professional. This computer took about 13 hours and 28 minutes to complete the primality test using LLR. Alejandro is a member of the CANAL@Boinc (http://www.primegrid.com/team_display.php?teamid=54) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-326834.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5669)