Riesel primes of the form 471•2n-1

Reserved! This sequence is currently part of Multi Reservation 8: NPLB Drive 17.

Current data

k , b : 471 , 2 Type : 3 Count : 52 Nash : 2376 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 13, 15, 37, 49, 70, 99, 135, 159, 193, 199, 310, 379, 402, 415, 442, 687, 987, 1201, 1665, 1939, 2122, 3097, 4050, 4461, 5853, 7455, 7687, 7923, 8769, 19867, 31081, 52449, 61143, 75865, 224995, 230518, 266950, 379746, 461146, 514399, 594003, 719122, 984442, 1017306, 1582593, 1604233, 1755262, 2220478, 2566323, 2762718

History

• 2023-12-23: Found n = 2762718, Florian Piesker
• 2023-08-23: Found n = 2566323, Florian Piesker
• 2023-01-04: Found n = 2220478, Florian Piesker
• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-04-11: Found n = 1755262, Göran Schmidt
• 2020-11-20: Found n = 1604233, William Byerly
• 2018-11-24: Found n = 1582593, Dmitry Domanov
• 2011-08-12: Found n = 1017306, Chris Chatfield
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-11-03: Found n = 984442, Gary Barnes
• 2009-09-25: Found n = 719122, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-12-18: Found n = 594003, Carlos Eduardo Pinho
• 2008-08-03: Found n = 514399, Gary Barnes
• 2008-06-17: Found n = 461146, Karsten Bonath
• 2008-03-15: Found n = 379746, James P. Burt
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2005-09-21: Found n = 230518, Steven Harvey
• 2004-11-10: Found n = 224995, Steven Harvey
• 1998-11-02: Found n = 31081, Christ van Willegen
• 1998-10-23: Found n = 19867, Christ van Willegen