Riesel primes of the form 391•2n-1

Current data

k , b : 391 , 2 Count : 46 Nash : 2555 Max n : 2,000,000 Date : 2014-08-20

5, 7, 9, 13, 19, 23, 33, 35, 45, 57, 65, 97, 149, 153, 169, 257, 299, 363, 427, 979, 1103, 1463, 2397, 2583, 3109, 3417, 3489, 6857, 6883, 11587, 29025, 68177, 70935, 76743, 78259, 102445, 121999, 133655, 205573, 362657, 863459, 1247959, 1596805, 1780155, 1886863, 1949159

History

• 2014-08-20: Checked to n = 2000000, NPLB Mini Drive 5, released
• 2014-08-16: Found n = 1949159, Göran Schmidt
• 2014-08-11: Found n = 1886863, Lennart Vogel
• 2014-08-05: Found n = 1780155, Lennart Vogel
• 2014-06-04: Found n = 1596805, Kai Inouye
• 2013-08-17: Reserved by NPLB Mini Drive 5, for 1300000<n<2000000
• 2010-11-30: Checked to n = 1300000, Ian M. Gunn, released
• 2010-11-19: Found n = 1247959, Ian M. Gunn
• 2010-09-01: Reserved by Ian M. Gunn, for 1000000<n<1300000
• 2009-10-29: Checked to n = 1000000, Ian M. Gunn, released
• 2009-10-18: Checked to n = 985000, Ian M. Gunn
• 2009-10-14: Checked to n = 979000, Ian M. Gunn
• 2009-10-01: Checked to n = 961000, Ian M. Gunn
• 2009-08-30: Checked to n = 921000, Ian M. Gunn
• 2009-08-14: Checked to n = 900000, Ian M. Gunn
• 2009-07-20: Checked to n = 867000, Ian M. Gunn
• 2009-07-18: Found n = 863459, Ian M. Gunn
• 2009-06-28: Checked to n = 836000, Ian M. Gunn
• 2009-06-09: Checked to n = 809000, Ian M. Gunn
• 2009-05-25: Checked to n = 787000, Ian M. Gunn
• 2009-05-12: Checked to n = 763000, Ian M. Gunn
• 2009-04-23: Checked to n = 724000, Ian M. Gunn
• 2009-04-11: Checked to n = 700000, Ian M. Gunn
• 2009-03-20: Checked to n = 650000, Ian M. Gunn
• 2009-03-08: Checked to n = 616000, Ian M. Gunn
• 2009-03-01: Reserved by Ian M. Gunn, for 600000<n<1000000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2005-10-23: Found n = 362657, Peter O'braian
• 2004-02-11: Found n = 205573, Peter O'braian
• 2002-04-27: Found n = 133655, Peter O'braian
• 2002-04-24: Found n = 121999, Peter O'braian
• 2002-03-04: Found n = 102445, Kimmo Herranen
• 2001-03-19: Found n = 78259, Steven Harvey
• 2001-03-19: Found n = 76743, Steven Harvey
• 2001-03-19: Found n = 70935, Steven Harvey
• 2001-03-15: Found n = 68177, Steven Harvey