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Riesel primes of the form 641•2ⁿ-1

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Revision as of 13:47, 10 March 2023 by Gd barnes (talk | contribs) (add history)

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

Current data

`k` , `b` :	641 , 2
Type :	Low
Count :	14
Nash :	905
Max `n` :	2,200,000
Date :	2024-07-30
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

6, 14, 38, 78, 186, 2006, 2594, 17018, 17714, 20018, 118254, 148290, 496430, 1018986

History

2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
2012-02-23: Found n = 1018986, Lennart Vogel
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
2008-07-07: Found n = 496430, Gary Barnes
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
2003-04-11: Found n = 118254, Steven Harvey

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