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Riesel primes of the form 661•2ⁿ-1

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

Current data

`k` , `b` :	661 , 2
Count :	14
Nash :	1027
Max `n` :	2,170,000
Date :	2024-04-02
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 47, 55, 311, 325, 2449, 3829, 15935, 26327, 122031, 129069, 229911, 311207

History

2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
2008-12-22: Checked to n = 600000, NPLB Drive 1, released
2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
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
2004-12-20: Found n = 229911, Steven Harvey
2003-08-18: Found n = 129069, Dennis Okon
2003-08-18: Found n = 122031, Dennis Okon

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