Riesel primes of the form 957•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 957 , 2 Type : 3 Count : 48 Nash : 2712 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 18, 20, 22, 25, 26, 28, 29, 38, 53, 70, 73, 77, 133, 149, 152, 206, 325, 434, 540, 841, 1676, 2286, 2626, 2641, 2936, 2989, 12040, 21796, 31214, 39362, 43585, 54973, 77060, 97525, 166909, 261232, 337858, 341989, 460820, 535472, 726085, 1078712, 1262808, 1435600, 1735552, 1774672, 2226209

History

• 2024-10-29: Found n = 2226209, Göran Schmidt, NPLB Drive 18
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2022-07-28: Found n = 1774672, Gary Barnes
• 2022-06-14: Found n = 1735552, Gary Barnes
• 2016-07-19: Found n = 1435600, Max Dettweiler
• 2013-10-26: Found n = 1262808, Gary Barnes
• 2012-03-13: Found n = 1078712, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2009-10-14: Found n = 726085, Ian M. Gunn
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-09-12: Found n = 535472, Gary Barnes
• 2008-06-15: Found n = 460820, Karsten Bonath
• 2008-04-03: Found n = 341989, Victor Felder
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-01-25: Found n = 337858, Carlos Eduardo Pinho
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000