Riesel primes of the form 319•2n-1

Current data

k , b : 319 , 2 Count : 39 Nash : 1792 Max n : 3,000,000 Date : 2022-06-03

3, 9, 11, 27, 41, 69, 101, 233, 291, 383, 479, 573, 665, 837, 1013, 1505, 1739, 3987, 5913, 7701, 10145, 10643, 19571, 35621, 38337, 66537, 75213, 85287, 216579, 254747, 286103, 404643, 629783, 671009, 1344059, 1740047, 1797261, 2130729, 2498685

History

• 2022-06-03: Checked to n = 3000000, NPLB Drive 15, released
• 2018-10-07: Found n = 2498685, Ricky L. Hubbard
• 2015-05-26: Found n = 2130729, Gary Barnes, found by (composite) 2015-04-08
• 2014-12-29: Reserved by NPLB Drive 15, for n=2000000-3000000
• 2013-07-04: Checked to n = 2000000, Ian M. Gunn, released
• 2013-06-17: Found n = 1797261, Ian M. Gunn
• 2013-06-13: Found n = 1740047, Ian M. Gunn
• 2013-05-23: Found n = 1344059, Ian M. Gunn
• 2013-05-20: Reserved by Ian M. Gunn for 1300000<n<2000000
• 2011-11-29: Checked to n = 1300000, Johnathan Chu
• 2011-10-23: Checked to n = 1270000, Johnathan Chu
• 2011-06-26: Checked to n = 1190000, Johnathan Chu
• 2011-04-17: Checked to n = 1140000, Johnathan Chu
• 2011-03-11: Checked to n = 1110000, Johnathan Chu
• 2011-02-09: Checked to n = 1080000, Johnathan Chu
• 2011-01-11: Checked to n = 1050000, Johnathan Chu
• 2010-12-07: Reserved by Johnathan Chu, to n=1100000
• 2010-11-27: Reserved by Johnathan Chu, for 1000000<n<1020000
• 2009-06-25: Checked to n = 1000000, Sven Stockmann, released
• 2009-06-21: Checked to n = 975000, Sven Stockmann
• 2009-06-17: Checked to n = 950000, Sven Stockmann
• 2009-06-12: Checked to n = 925000, Sven Stockmann
• 2009-05-31: Checked to n = 900000, Sven Stockmann
• 2009-05-28: Checked to n = 875000, Sven Stockmann
• 2009-05-26: Checked to n = 847000, Sven Stockmann
• 2009-05-03: Checked to n = 719000, Sven Stockmann and 850000<n<862000 done
• 2009-04-28: Reserved by Sven Stockmann, for 700000<n<1000000
• 2009-03-27: Checked to n = 700000, Gary Barnes, released
• 2009-03-22: Checked to n = 635000, Gary Barnes
• 2009-03-21: Found n = 629783, Gary Barnes
• 2009-03-19: Found n = 671009, Gary Barnes
• 2009-03-14: Reserved by Gary Barnes, for 600000<n<700000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-03-23: Found n = 404643, Carlos Eduardo Pinho
• 2008-03-06: 286103 confirmed, James P. Burt
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2005-03-18: Found n = 254747, Jun Tajima
• 2005-01-14: Found n = 216579, Steven Harvey
• 2001-07-16: Found n = 85287, Sander Hoogendoorn
• 2001-07-09: Found n = 75213, Sander Hoogendoorn