Riesel primes of the form 327•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

k , b : 327 , 2 Type : 3 Count : 67 Nash : 3160 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 2, 4, 5, 9, 12, 20, 24, 41, 58, 65, 82, 85, 138, 192, 281, 372, 425, 564, 1242, 1346, 1781, 2516, 2964, 3001, 3033, 3098, 3145, 3234, 3341, 3522, 3816, 4522, 4882, 5188, 5661, 5700, 5921, 6844, 8138, 9292, 10826, 12514, 14464, 14605, 22465, 27445, 35100, 44536, 46954, 47146, 87513, 89778, 101818, 116160, 178660, 180580, 181569, 245009, 246001, 381552, 552901, 869829, 949109, 1473201, 2881349, 7044001

History

• 2022-05-13: Found n = 2881349, Oliver Kruse
• 2021-01-13: Found n = 7044001, Ryan Propper
• 2014-12-29: Reserved by NPLB Drive 15, for n=2000000-3000000
• 2013-02-02: Checked to n = 2000000, NPLB Mini Drive 3, released
• 2011-10-11: Found n = 1473201, Chris Chatfield
• 2010-05-18: Reserved by NPLB Mini Drive 3, for 1000000<n<1300000
• 2009-09-11: Checked to n = 1000000, NPLB Mini Drive 1, released
• 2009-07-31: Found n = 949109, Karsten Bonath
• 2009-05-28: Found n = 869829, Karsten Bonath
• 2009-05-14: Reserved by NPLB Mini Drive 1, for 600000<n<970000
• 2008-12-30: Reserved by NPLB Mini Drive 1, for 600000<n<950000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-10-30: Found n = 552901, Lennart Vogel
• 2008-03-09: Found n = 381552, Adam Sutton
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2005-09-19: Found n = 246001, Dale Andrews
• 2005-09-18: Found n = 245009, Dale Andrews
• 2004-10-04: Found n = 181569, Steven Harvey
• 2004-10-04: Found n = 180580, Steven Harvey
• 2004-08-09: Found n = 178660, Steven Harvey
• 2002-07-10: Found n = 116160, Kimmo Herranen
• 2002-07-10: Found n = 101818, Kimmo Herranen
• 2001-07-26: Found n = 89778, Sander Hoogendoorn
• 2001-07-26: Found n = 87513, Sander Hoogendoorn