Riesel primes of the form 549•2n-1

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

Current data

k , b : 549 , 2 Type : 3 Count : 61 Nash : 3181 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 4, 7, 11, 12, 23, 28, 33, 39, 43, 48, 81, 147, 177, 324, 373, 384, 411, 1084, 1361, 1380, 1884, 1908, 2883, 4247, 7821, 8560, 9360, 13368, 17368, 24159, 26124, 33813, 34152, 39111, 53761, 62807, 64239, 64704, 89309, 95920, 118081, 132193, 141983, 194543, 215441, 277884, 306507, 332721, 359183, 362213, 407437, 800603, 868860, 962377, 1021391, 1063317, 1406577, 1942139, 1971947

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-07-26: Found n = 1971947, Florian Piesker
• 2022-07-12: Found n = 1942139, Oliver Kruse
• 2015-04-01: Found n = 1406577, Timothy Sorbera
• 2011-11-07: Found n = 1063317, Sascha Beat Dinkel
• 2011-08-12: Found n = 1021391, Chris Chatfield
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-10-31: Found n = 962377, Gary Barnes
• 2010-08-16: Found n = 868860, Vaughan Davies
• 2010-05-23: Found n = 800603, Gary Barnes
• 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
• 2008-03-11: Found n = 407437, James P. Burt
• 2008-02-21: Found n = 362213, James P. Burt
• 2008-02-19: Found n = 359183, Gary Barnes
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-12-09: Found n = 215441, Steven Harvey
• 2004-12-07: Found n = 194543, Steven Harvey
• 2004-01-04: Found n = 141983, Steven Harvey
• 2003-04-06: Found n = 118081, Steven Harvey
• 2001-12-24: Found n = 95920, Kimmo Herranen
• 2001-12-23: Found n = 89309, Kimmo Herranen