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Riesel primes of the form 427•2ⁿ-1

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

Current data

`k` , `b` :	427 , 2
Type :	Low
Count :	18
Nash :	903
Max `n` :	2,820,000
Date :	2024-03-09
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 33, 117, 241, 453, 1857, 2245, 5721, 5917, 5961, 32373, 35833, 75909, 91057, 1577169, 1590349, 1593361

History

2019-04-09: Found n = 1593361, Ian M. Gunn
2019-02-21: Found n = 1590349, Ricky L. Hubbard
2018-10-13: Found n = 1577169, Dmitry Domanov
2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
2010-11-11: Checked to n = 1000000, NPLB Drive 5
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
2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
2001-05-25: Found n = 91057, Brian J. Beesley
2001-04-24: Found n = 75909, Brian J. Beesley

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