Riesel primes of the form 231•2n-1

Current data

k , b : 231 , 2 Type : 3 Count : 77 Nash : 3340 Max n : 3,000,000 Date : 2024-04-23

1, 3, 6, 7, 21, 29, 46, 49, 54, 57, 73, 90, 118, 169, 207, 267, 287, 333, 354, 366, 370, 463, 493, 497, 507, 655, 729, 735, 757, 1054, 1377, 1770, 2098, 2886, 3225, 3611, 3625, 3657, 4849, 5706, 5749, 5771, 7110, 8395, 12150, 15658, 16182, 16693, 17363, 20279, 27619, 35953, 39733, 53949, 75349, 80638, 82887, 92154, 162154, 169955, 205017, 224297, 248359, 345183, 369583, 465391, 498961, 535713, 668218, 749301, 959375, 1169250, 1278235, 1332103, 1612617, 1860743, 2335281

History

• 2024-04-23: Reservation dropped, Michael Curtis
• 2023-07-17: Checked to n = 3000000, Michael Curtis
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-03-13: Checked to n = 2350000, Michael Curtis
• 2019-12-21: Found n = 2335281, Michael Curtis
• 2016-01-03: Checked to n = 2000000, Michael Curtis
• 2015-07-21: Found n = 1860743, Michael Curtis
• 2015-06-23: Found n = 1612617, Michael Curtis
• 2015-04-01: Checked to n = 1570000, Michael Curtis
• 2013-06-11: Checked to n = 1400000, Michael Curtis
• 2013-04-07: Checked to n = 1360000, Michael Curtis
• 2013-03-06: Found n = 1332103, Michael Curtis
• 2013-02-02: Reserved by Michael Curtis from n=13000000
• 2012-05-14: Checked to n = 1300000, James P. Burt, released
• 2012-05-11: Found n = 1278235, James P. Burt
• 2012-03-19: Found n = 1169250, James P. Burt
• 2011-12-31: Checked to n = 1100000, James P. Burt
• 2011-12-10: Reserved by James P. Burt from n=1000000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1000000-5000000
• 2006-11-02: Found n = 959375, Larry Soule
• 2006-01-23: Found n = 749301, Larry Soule
• 2005-08-31: Found n = 668218, Larry Soule
• 2005-03-11: Found n = 535713, Larry Soule
• 2005-03-07: Found n = 498961, Larry Soule
• 2005-03-01: Found n = 465391, Larry Soule
• 2005-02-21: Found n = 369583, Larry Soule
• 2005-02-15: Found n = 345183, Larry Soule
• 2005-01-16: Found n = 248359, Charles H. Lasher
• 2005-01-14: Found n = 224297, Patrick Keller
• 2005-01-11: Found n = 205017, Patrick Keller
• 2004-05-12: Found n = 162154, Jocelyn Larouche
• 2004-03-01: Found n = 169955, Thomas Masser
• 2000-05-03: Found n = 53949, Phil Carmody
• 1999-02-09: Found n = 39733, Tom Kuechler
• 1999-02-09: Found n = 35953, Tom Kuechler
• 1999-01-26: Found n = 27619, Tom Kuechler
• 1989: Found n = 16182, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown