PrimeGrid: Prime Fermat Divisor found

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Congratulations to Mark Doom (Mark Doom (http://www.primegrid.com/show_user.php?userid=82310)) of the United States, the discoverer of PrimeGrid's sixth Prime Fermat Divisor in the Proth Prime Search project: 3771*2^221676+1 Divides F(221670). This is the 289th known divisor and the 6th found in 2011. Mark is a member of team Aggie The Pew (http://www.primegrid.com/team_display.php?teamid=2280).More details coming soon.

More... (http://www.primegrid.com/forum_thread.php?id=3468)