Riesel primes of the form 301•2n-1

Current data

k , b : 301 , 2 Count : 51 Nash : 2158 Max n : 5,000,000 Date : 2024-08-15

1, 5, 9, 17, 29, 39, 57, 69, 75, 103, 159, 293, 369, 391, 437, 453, 465, 631, 1257, 1325, 1591, 1661, 1809, 3737, 4385, 5515, 8455, 9727, 14113, 15307, 19353, 21113, 24523, 28817, 32307, 37023, 39045, 100665, 192489, 210213, 236969, 253457, 314825, 439347, 554825, 566979, 587635, 1157561, 1514873, 1801207, 3211281

History

• 2024-08-15: Checked to n = 5000000, NPLB Drive High-n, released
• 2022-06-15: Found n = 3211281, Oliver Kruse, NPLB Drive High-n
• 2022-06-03: Reserved by NPLB Drive High-n, for 3000000 < n < 5000000
• 2022-06-03: Checked to n = 3000000, NPLB Drive 15, released
• 2014-12-29: Reserved by NPLB Drive 15, for 2000000 < n < 3000000
• 2013-04-01: Checked to n = 2000000, Dmitry Domanov, released
• 2013-03-31: Reserved by Lennart Vogel (for 1500000 < n < 2000000), cancelled
• 2012-10-10: Checked to n = 1300000, Gary Barnes, double-checked, released
• 2012-09-25: Reserved by Gary Barnes, for 1000000 < n < 1300000
• 2012: Checked to n = 1500000, Dmitry Domanov
• 2010-10-08: Found n = 1801207, Dmitry Domanov
• 2010-09-21: Found n = 1514873, Dmitry Domanov
• 2010-09-04: Found n = 1157561, Dmitry Domanov
• 2010-06-26: Reserved by Dmitry Domanov, for 1000000 < n < 2000000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-11-08: 587635 confirmed, Gary Barnes
• 2008-11-03: 566979 confirmed, Gary Barnes
• 2008-10-31: 554825 confirmed, Lennart Vogel
• 2008-09-06: Checked to n = 1000000, Gary Barnes, released
• 2008-09-03: Checked to n = 992000, Gary Barnes
• 2008-07-04: Checked to n = 967000, Gary Barnes
• 2008-06-17: Checked to n = 918000, Gary Barnes
• 2008-06-01: Checked to n = 900000, Gary Barnes
• 2008-05-18: Checked to n = 777300, Gary Barnes
• 2008-05-09: Checked to n = 732500, Gary Barnes
• 2008-05-02: Checked to n = 690000, Gary Barnes
• 2008-04-08: Reserved by Gary Barnes, for 600000 < n < 1000000
• 2008-03-06: 314825 confirmed, James P. Burt
• 2008-03-01: Reserved by NPLB Drive 3, for 260000 < n < 600000
• 2007-07-11: Found n = 587635, Peter Benson
• 2007-07-06: Found n = 566979, Peter Benson
• 2007-07-03: Found n = 554825, Peter Benson
• 2007-08-18: Found n = 439347, James S. Griffin
• 2002-10: Found n = 253457, James S. Griffin
• 2002-09-22: Found n = 236969, James S. Griffin
• 2002-09-01: Found n = 210213, James S. Griffin
• 2002-08-10: Found n = 192489, James S. Griffin
• 2001-03-16: Found n = 100665, Kimmo Herranen
• 1999-05-06: Found n = 39045, Dale Andrews
• 1999-05-06: Found n = 37023, Dale Andrews
• 1999-05-05: Found n = 32307, Dale Andrews
• 1999-05-04: Found n = 28817, Dale Andrews