Riesel primes of the form 205•2ⁿ-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

`k` , `b` :	205 , 2
Count :	41
Nash :	1351
Max `n` :	2,800,000
Date :	2024-11-13
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 39, 45, 49, 67, 75, 99, 129, 159, 177, 445, 721, 771, 829, 849, 865, 1971, 3045, 8397, 9019, 10749, 21037, 30529, 38349, 46257, 53577, 64695, 77451, 128019, 420297, 462261, 749859, 756705, 1019679, 1275889, 1300401, 1537779, 1666435, 2559417, 2747571

2024-10-19: Found n = 2747571, Gary Barnes, NPLB K300 Drive 1
2024-07-30: Found n = 2559417, Florian Piesker, NPLB K300 Drive 1
2024-05-05: Reserved by NPLB K300 Drive 1 for n > 2200000
2022-03-09: Checked to n = 2222000, RPS Megabit Drive 3
2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
2014-06-03: Found n = 1666435, Serge Batalov, RPS Megabit Drive 3
2014-06-02: Found n = 1537779, Serge Batalov, RPS Megabit Drive 3
2014-05-30: Reserved by RPS Megabit Drive 3 for n > 1400000
2011-02-01: Checked to n = 1400000, RPS Drive 6, released
2010-11-19: Found n = 1300401, Carlos Eduardo Pinho, RPS Drive 6
2010-11-11: Found n = 1275889, Carlos Eduardo Pinho, RPS Drive 6
2008-11-27: Found n = 1019679, Even Stokkedalen, RPS Drive 6
2008-08-11: Found n = 756705, David Metcalfe, RPS Drive 6
2008-08-11: Found n = 749859, David Metcalfe, RPS Drive 6
2008-06-22: Reserved by RPS Drive 6, for n > 600000
2006-12-16: Checked to n = 600000, RPS Drive 4, released
2006-09-01: Found n = 462261, David Metcalfe, RPS Drive 4
2006-08-24: Found n = 420297, J. Craig Brunson, RPS Drive 4
2006-07-28: Reserved by RPS Drive 4, for n = 250000 - 600000
2004?: Checked to n = 250000, Mark Anderson, released
2004-06-04: Reserved by Mark Anderson, for n ≤ 250000