Riesel primes of the form 319•2n-1

Reserved! This sequence is currently part of Multi Reservation 26: NPLB Drive 19.

Current data

k , b : 319 , 2 Count : 39 Nash : 1792 Max n : 3,100,000 Date : 2024-08-15 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

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

• 2023-03-07: Reserved by NPLB Drive 19, for 3000000<n<4000000
• 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