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Riesel primes of the form 997•2ⁿ-1

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

Current data

`k` , `b` :	997 , 2
Count :	21
Nash :	1036
Max `n` :	2,170,000
Date :	2024-04-02
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 21, 29, 177, 565, 817, 1045, 1329, 4161, 4809, 5081, 6769, 7441, 42629, 74125, 183897, 217917, 426361, 438705, 1124781

History

2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
2012-04-19: Found n = 1124781, 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
2008-12-22: Checked to n = 600000, NPLB Drive 1, released
2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
2008-05-19: Found n = 438705, Glenn C. Kaiser
2008-05-06: Found n = 426361, Carlos Eduardo Pinho
2008-03-25: Checked to n = 333200, NPLB Drive 2, released
2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
2004-09-21: Found n = 217917, Peter Benson
2001-04-13: Found n = 183897, Kimmo Herranen
2001-04-01: Found n = 74125, Kimmo Herranen

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