Riesel primes of the form 9•2n-1

Reserved! This sequence is currently reserved by: Dmitry Domanov

Current data

k , b : 9 , 2 Type : 3 Count : 48 Nash : 1674 Max n : 7,800,000 Date : 2024-08-10 Reserved : Dmitry DomanovDmitry Domanov/Reserved

1, 3, 7, 13, 15, 21, 43, 63, 99, 109, 159, 211, 309, 343, 415, 469, 781, 871, 939, 1551, 3115, 3349, 5589, 5815, 5893, 7939, 8007, 11547, 12495, 22555, 23647, 35647, 83415, 103059, 184999, 275859, 384243, 484975, 503893, 828709, 1010277, 1419855, 1481821, 2060941, 3259381, 4005979, 4683555, 7479919

Remarks :

The sequence A002236 in OEIS

History

• 2024-08-10: Checked to n = 7800000, Dmitry Domanov
• 2023-06-04: Found n = 7479919, Dmitry Domanov
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-10-29: Checked to n = 6500000, Dmitry Domanov
• 2020-08-23: Checked to n = 6350000, Dmitry Domanov
• 2020-03-11: Checked to n = 6000000, Dmitry Domanov
• 2015-11-03: Checked to n = 6000000, Dmitry Domanov
• 2015-05-06: Checked to n = 5700000, Dmitry Domanov
• 2014-12-24: Checked to n = 5220000, Dmitry Domanov
• 2014-09-29: Reserved by Dmitry Domanov for n=5000000-6000000
• 2013-01-07: Checked to n = 5000000, Peter Benson
• 2012-12-24: Found n = 4683555, Peter Benson
• 2012-11-17: Found n = 4005979, Peter Benson
• 2012-11-17: Reserved by Peter Benson from n=4000000
• 2012-03-17: Checked to n = 4000000, Peter Benson
• 2011-11-27: Found n = 3259381, Peter Benson
• 2011-11-01: Reserved by Peter Benson from n=3000000
• 2011-06-02: Checked to n = 3000000, Peter Benson
• 2011-04-05: Reserved by Peter Benson
• 2010-12-23: Checked n = 2105192? - 2106000, Predrag Minovic
• 2010-12-23: Checked n = 1840000 - 1968000, Larry Soule
• 2010-10-31: Checked to n = 1840000, Predrag Minovic
• 2010-09-05: Checked to n = 1814000, Predrag Minovic
• 2010-07-18: Checked to n = 1610000, Predrag Minovic
• 2010-06-05: Checked to n = 1570000, Predrag Minovic
• 2010-04-11: Checked to n = 1540000, Predrag Minovic
• 2010-02-11: Checked to n = 1530000, Predrag Minovic
• 2009-12-05: Checked to n = 1520000, Predrag Minovic
• 2009-11-24: Found n = 1419855, Predrag Minovic
• 2009-11-20: Checked to n = 1415000, Predrag Minovic
• 2009-11-03: Checked n = 1350000 - 1375000, 1400000 - 1414000, Adam Sutton
• 2009-11-03: Checked n = 1221088? - 1350000, 1375000 - 1400000, Predrag Minovic
• 2009-01-18: Checked n = 3499107 - 3563355, Peter Benson
• 2009-01-10: Checked n = 1330000? - 1430000?, Adam Sutton
• 2009-01-09: Checked n = 1430023 - 1454791, 1455171 - 1518147, 1652067 - 1810159, 1967643 - 2105191, 2366487 - 2406243, Peter Benson
• 2009-01-09: Checked n = 950000 - 1067108, 1140015 - 1221087, Peter Benson
• 2008-08-27: Found n = 2060941, Peter Benson
• 2008-04-12: Found n = 1481821, Peter Benson
• 2008-02-29: Checked n = 850000 - 1200000, Adam Sutton
• 2008-02-01: Reserved by Adam Sutton for n>1000000
• 2007-11-15: Found n = 1010277, Peter Benson
• 2007-04-07: Checked to n = 850000, Jeffrey Sax
• 2005-02-03: Found n = 828709, Jeffrey Sax
• 2005-01-16: Checked to n = 801000, Jeffrey Sax
• 2004-11-28: Checked to n = 744000, Jeffrey Sax
• 2004-07-24: Found n = 503893, Jeffrey Sax
• 2004-07-14: Found n = 484975, Jeffrey Sax
• 2004-06-13: Found n = 384243, Jeffrey Sax
• 2004-05-23: Found n = 275859, Jeffrey Sax
• 2000-04-03: Found n = 184999, Ingo Buechel, Wilfrid Keller
• 1999-02-14: Found n = 103059, Ingo Buechel, Wilfrid Keller
• 1999-01-15: Found n = 83415, Ingo Buechel, Wilfrid Keller
• 1998-06-16: Found n = 23647, Wilfrid Keller
• 1998-06-16: Found n = 22555, Wilfrid Keller
• 1989: Found n = 35647, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1981: Found n = 12495, Anders Björn, Hans Riesel
• 1980: Found n = 8007, Jurgen Buhl, Walter Borho
• 1980: Found n = 7939, Jurgen Buhl, Walter Borho
• 1980: Found n = 5893, Jurgen Buhl, Walter Borho
• 1980: Found n = 5815, Jurgen Buhl, Walter Borho
• 1980: Found n = 5589, Jurgen Buhl, Walter Borho
• 1980: Found n = 3349, Jurgen Buhl, Walter Borho
• 1979: Found n = 11547, Jurgen Buhl, Walter Borho