Riesel primes of the form 301•2n-1

Reserved! This sequence is currently part of Multi Reservation 27: NPLB Drive High-n.

Current data

k , b : 301 , 2 Count : 51 Nash : 2158 Max n : 4,800,000 Date : 2023-11-20 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

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

• 2022-06-15: Found n = 3211281, Oliver Kruse
• 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