Riesel primes of the form 455•2n-1

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

Current data

k , b : 455 , {{{Rb}}} Count : 33 Nash : 1416 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

20, 24, 30, 62, 94, 102, 112, 270, 640, 756, 1172, 1742, 1764, 2550, 3806, 4180, 4822, 5432, 38220, 40300, 44780, 56640, 72780, 83686, 87564, 177376, 178600, 198694, 218070, 233584, 239502, 615036, 937606

[[Category:Riesel {{{Rb}}}|#.....00455]]

History

• 2018-03-09: Found n=1560160, (Sashixi), submitted by Gary Barnes, but was composite
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-10-29: Found n = 937606, Brian Lody
• 2009-01-03: Found n = 615036, Ian M. Gunn
• 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
• 2005-09-21: Found n = 239502, Steven Harvey
• 2005-09-21: Found n = 233584, Steven Harvey
• 2004-11-08: Found n = 218070, Steven Harvey
• 2004-11-08: Found n = 198694, Steven Harvey
• 2004-08-18: Found n = 178600, Steven Harvey
• 2004-08-18: Found n = 177376, Steven Harvey