Riesel primes of the form 27•2n-1

Current data

k , b : 27 , 2 Type : 3 Count : 68 Nash : 2376 Max n : 10,000,000 Date : 2022-03-21

1, 2, 4, 5, 8, 10, 14, 28, 37, 38, 70, 121, 122, 160, 170, 253, 329, 362, 454, 485, 500, 574, 892, 962, 1213, 1580, 2642, 2708, 4505, 8152, 11858, 13300, 15041, 16118, 16778, 19069, 22769, 29020, 30298, 30377, 35942, 42817, 42869, 62024, 74629, 90449, 91042, 117901, 128594, 143330, 152530, 157898, 175852, 282700, 340682, 444622, 627794, 729314, 777992, 1108214, 1163629, 1253870, 1902689, 3855094, 4542344, 4583717, 8342438, 10902757

Remarks :

The sequence A050539 in OEIS

History

• 2022-03-21: Checked to n = 10000000, PrimeGrid 27121 Prime Search, released
• 2022-03-07: Found n = 10902757, Ryan Propper
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2021-02-01: Found n = 8342438, Andrew M. Farrow, PrimeGrid 27121 Prime Search, (Official announcement)
• 2014-08-22: Found n = 4583717, Hans Joachim Böhm, PrimeGrid 27121 Prime Search, (Official announcement)
• 2014-07-18: Found n = 4542344, James Scott Brown, PrimeGrid 27121 Prime Search, (Official announcement)
• 2012-02-28: Found n = 3855094, Pietari Snow, PrimeGrid 27121 Prime Search, (Official announcement)
• 2009-12-10: Found n = 1902689, Peter Kaiser, PrimeGrid 27121 Prime Search, 12121 Search
• 2009-02-13: Reserved by PrimeGrid 27121 Prime Search
• 2009-01-10: Checked to n = 1614000, Justin Van Klein???
• 2008-06-29: Found n = 1253870, Frank Clowes, 12121 Search
• 2008-03-23: Found n = 1108214, Arnold Padro, 12121 Search
• 2008-03-17: Found n = 1163629, Peter Benson
• 2007-12-02: Checked to n = 1019000, Justin Van Klein???
• 2005-11-18: Found n = 777992, James P. Burt, 12121 Search
• 2005-07-14: Found n = 729314, William W. Mikrut, 12121 Search
• 2005-03-31: Found n = 627794, Chris Chatfield, 12121 Search
• 2004-07-12: Found n = 444622, Steven Harvey
• 2004-05-31: Found n = 340682, Steven Harvey
• 2003-06-22: Found n = 175852, Stephane Roth
• 2002-09-07: Found n = 157898, Stephane Roth
• 2002-07-10: Found n = 152530, Stephane Roth
• 2002-04-24: Found n = 143330, Stephane Roth
• 2001-08-05: Found n = 128594, Stephane Roth
• 2001-04-08: Found n = 91042, Stephane Roth
• 2001-04-05: Found n = 90449, Stephane Roth
• 2001-02-12: Found n = 74629, Stephane Roth
• 2001-04-14: Found n = 62024, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 2000-05-19: Found n = 42869, Phil Carmody
• 2000-05-19: Found n = 42817, Phil Carmody
• 1999-10-15: Found n = 35942, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1998-08-23: Found n = 30377, Wilfrid Keller
• 1998-08-23: Found n = 30298, Wilfrid Keller
• 1998-08-23: Found n = 29020, Wilfrid Keller
• 1998-08-08: Found n = 22769, Wilfrid Keller
• 1989: Found n = 19069, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 13300, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 8152, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown