Riesel primes of the form 75•2n-1

Current data

k , b : 75 , 2 Type : 315 Count : 65 Nash : 3181 Max n : 3,000,000 Date : 2024-09-03

1, 3, 5, 6, 18, 19, 20, 22, 28, 29, 39, 43, 49, 75, 85, 92, 111, 126, 136, 159, 162, 237, 349, 381, 767, 969, 1247, 1893, 1951, 2363, 2657, 3065, 3090, 3836, 4110, 4342, 5671, 6807, 21945, 24658, 30082, 31811, 54510, 70828, 79292, 80938, 84432, 92235, 113429, 170933, 182433, 196071, 199819, 231580, 306789, 424392, 434323, 631091, 814857, 995721, 2050637, 2130432, 2562382, 3006235, 3271125

History

• 2024-09-03: Found n = 3271125, Serge Batalov
• 2024-08-30: Found n = 3006235, Serge Batalov
• 2024-05-07: Reservation dropped, William Byerly
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2017-07-27: Reserved by William Byerly
• 2013-10-01: Checked to n = 3000000, Larry Soule, released
• 2011-10-26: Checked to n = 3000000, Larry Soule
• 2011-09-03: Found n = 2562382, Larry Soule
• 2011-08-25: Checked to n = 2300000, Larry Soule
• 2011-07-25: Found n = 2130432, Larry Soule
• 2011-07-18: Found n = 2050637, Larry Soule
• 2011-07-11: Checked to n = 2000000, Larry Soule
• 2011-05-17: Checked to n = 1800000, Larry Soule
• 2011-04-21: Reserved by Larry Soule from n=1659823
• 2011-04-12: Checked to n = 1659823, Larry Soule
• 2011-03-15: Reserved by Larry Soule from n=1160000
• 2010-12-04: Checked to n = 1160000, Carlos Eduardo Pinho, released
• 2010-12-01: Reserved by Carlos Eduardo Pinho from n=1150000
• 2010-11-28: none, Carlos Eduardo Pinho, released
• 2010-11-23: Reserved by Carlos Eduardo Pinho
• 2010-04-13: Checked to n = 1150000, Predrag Minovic
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1500000-5000000
• 2008-01-29: Found n = 995721, Thomas Ritschel
• 2008-01-07: Checked to n = 850000, Thomas Ritschel
• 2007-11-28: Found n = 631091, Thomas Ritschel
• 2007-07-10: Found n = 814857, Peter Benson
• 2005-03-07: Found n = 434323, Thomas Ritschel
• 2005-03-07: Found n = 424392, Thomas Ritschel
• 2005-03-07: Found n = 306789, Thomas Ritschel
• 2004-06-12: Found n = 231580, Patrick Keller
• 2004-06-08: Found n = 199819, Patrick Keller
• 2004-06-07: Found n = 196071, Patrick Keller
• 2004-06-07: Found n = 182433, Patrick Keller
• 2004-06-06: Found n = 170933, Patrick Keller
• 1994: Found n = 6807, Harvey Dubner
• 1989: Found n = 24658, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 21945, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown