AMDave
01-20-2014, 02:04 PM
New SR5 Mega Prime Found!
On 17 January 2014, 6:53:10 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=59912 by finding the mega prime: 59912*5^1500861+1 (http://primes.utm.edu/primes/page.php?id=116924) The prime is 1,049,062 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 66th overall. This is the largest known base 5 mega prime. 40 k's now remain in the Sierpinski Base 5 Problem. The discovery was made by Raymond Ottusch (RaymondFO* (http://www.primegrid.com/show_user.php?userid=185653)) of the United States using an Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz with 24 GB RAM running Linux. This computer took about 3 hours and 41 minutes to complete the primality test using LLR. Raymond is a member of the Sicituradastra (http://www.primegrid.com/team_display.php?teamid=1596) team. The prime was verified on 17 January 2014 20:33:24 UTC, by Michael Wild (Tin Man (http://www.primegrid.com/show_user.php?userid=34978)) of the United Kingdom using an Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz with 4 GB RAM running Darwin. This computer took about 2 hours and 50 minute to complete the primality test using LLR. Michael is a member of the BOINC@AUSTRALIA (http://www.primegrid.com/team_display.php?teamid=25) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-59912.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5475)
On 17 January 2014, 6:53:10 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=59912 by finding the mega prime: 59912*5^1500861+1 (http://primes.utm.edu/primes/page.php?id=116924) The prime is 1,049,062 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 66th overall. This is the largest known base 5 mega prime. 40 k's now remain in the Sierpinski Base 5 Problem. The discovery was made by Raymond Ottusch (RaymondFO* (http://www.primegrid.com/show_user.php?userid=185653)) of the United States using an Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz with 24 GB RAM running Linux. This computer took about 3 hours and 41 minutes to complete the primality test using LLR. Raymond is a member of the Sicituradastra (http://www.primegrid.com/team_display.php?teamid=1596) team. The prime was verified on 17 January 2014 20:33:24 UTC, by Michael Wild (Tin Man (http://www.primegrid.com/show_user.php?userid=34978)) of the United Kingdom using an Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz with 4 GB RAM running Darwin. This computer took about 2 hours and 50 minute to complete the primality test using LLR. Michael is a member of the BOINC@AUSTRALIA (http://www.primegrid.com/team_display.php?teamid=25) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-59912.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5475)