Riesel primes of the form 663•2ⁿ-1

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

Current data

`k` , `b` :	663 , 2
Type :	3
Count :	51
Nash :	2792
Max `n` :	2,200,000
Date :	2024-07-30
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

3^[1], 4, 11, 14^[2], 15, 19, 24^[3], 31, 38, 55, 70^[4], 71, 143, 163, 176, 304, 367, 658, 1534, 1727, 2288, 4396, 5807, 10294, 10780, 10958, 14574, 17771, 38088, 39728, 46931, 51844, 58031, 70284, 71159, 92358, 137471, 140627, 147247, 244299, 259524, 288139, 425478, 473420, 684374, 762428, 1009098, 1368094, 1632948, 1847319, 1858195

2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
2022-12-12: Found n = 1858195, Gary Barnes, originally found by Max Dettweiler
2022-11-26: Found n = 1847319, Gary Barnes, originally found by Max Dettweiler
2021-10-19: Found n = 1632948, Gary Barnes
2014-11-03: Found n = 1368094, Göran Schmidt
2012-02-18: Found n = 1009098, 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
2010-10-04: Found n = 762428, Gary Barnes
2009-05-23: Found n = 684374, David James
2008-12-22: Checked to n = 600000, NPLB Drive 1, released
2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
2008-06-05: Found n = 473420, Bruce E. Slade
2008-05-08: Found n = 425478, Bruce E. Slade
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
2006-01-27: Found n = 259524, Steven Harvey
2006-01-25: Found n = 244299, Steven Harvey
2003-05-18: Found n = 147247, Dennis Okon
2003-05-18: Found n = 140627, Dennis Okon
2003-05-18: Found n = 137471, Dennis Okon
2002-01-13: Found n = 92358, Kimmo Herranen