Riesel primes of the form 257•2n-1

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

Current data

k , b : 257 , 2 Count : 37 Nash : 1867 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 6, 10, 16, 24, 60, 66, 82, 184, 256, 324, 424, 632, 756, 814, 872, 1114, 1702, 3282, 3420, 3862, 3864, 4162, 4510, 7030, 8410, 47974, 59236, 61084, 78034, 133980, 194312, 286832, 541402, 1064062, 1658254, 2108554

Remarks :

See also Williams 257•256n-1

History

• 2024-05-05: Reserved by NPLB K300 Drive 1 for n > 2200000
• 2022-03-09: Checked to n = 2222000, RPS Megabit Drive 3
• 2021-04-12: Found n = 2108554, Gary Barnes, RPS Megabit Drive 3
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-06-03: Found n = 1658254, 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
• 2008-12-17: Found n = 1064062, Even Stokkedalen, 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
• 2006-10-17: Found n = 541402, Predrag Minovic, RPS Drive 4
• 2006-07-28: Reserved by RPS Drive 4, for n = 320000 - 600000
• 2006-07-13: Found n = 286832, Tony Galvan
• 2004-02-03: Found n = 194312, Marcin Lipinski
• 2003-09-30: Found n = 133980, Marcin Lipinski
• 1998-12-11: Found n = 47974, Carlos Rivera