Riesel primes of the form 27•2n-1

Reserved! This sequence is currently part of Multi Reservation 23: Riesel problem 4.

Current data

k , b : 27 , 2 Type : 3 Count : 68 Nash : 2376 Max n : 2,000,000 Date : 2024-09-06 Reserved : Alexander JonesAlexander Jones/Reserved

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

History

• 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, (Official announcement)
• 2014-08-22: Found n = 4583717, Hans Joachim Böhm, PrimeGrid, (Official announcement)
• 2014-07-18: Found n = 4542344, James Scott Brown, PrimeGrid, (Official announcement)
• 2012-02-28: Found n = 3855094, Pietari Snow, PrimeGrid, (Official announcement)
• 2009-12-10: Found n = 1902689, Peter Kaiser
• 2009-01-10: Checked to n = 1614000, Justin Van Klein???
• 2008-06-29: Found n = 1253870, Frank Clowes
• 2008-03-23: Found n = 1108214, Arnold Padro
• 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
• 2005-07-14: Found n = 729314, William W. Mikrut
• 2005-03-31: Found n = 627794, Chris Chatfield
• 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