Riesel primes of the form 423•2n-1

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

Current data

k , b : 423 , 2 Type : 3 Count : 45 Nash : 2348 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

8, 10, 14, 22, 23, 30, 31, 42, 52, 103, 162, 194, 198, 294, 374, 727, 1647, 2159, 4024, 5674, 5698, 8442, 9238, 11503, 13079, 19174, 35522, 61462, 72612, 167375, 232218, 268231, 316412, 323880, 324430, 372408, 394575, 398044, 462792, 609975, 673728, 833558, 924562, 1243214, 1797511

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-04-27: Found n = 1797511, Florian Piesker
• 2013-06-16: Found n = 1243214, Gary Barnes
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-10-27: Found n = 924562, Scott Gilvey
• 2010-06-20: Found n = 833558, Vaughan Davies
• 2009-05-06: Found n = 673728, David James
• 2009-01-03: Found n = 609975, Glenn C. Kaiser
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-06-21: 462792 confirmed, Gary Barnes
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-03-05: 372408 confirmed, James P. Burt
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2005-10-30: Found n = 462792, Peter O'braian
• 2005-08-20: Found n = 398044, Peter O'braian
• 2005-08-19: Found n = 394575, Peter O'braian
• 2005-08-14: Found n = 372408, Peter O'braian
• 2005-01-06: Found n = 324430, Peter O'braian
• 2005-01-06: Found n = 323880, Peter O'braian
• 2005-01-06: Found n = 316412, Peter O'braian
• 2004-12-23: Found n = 268231, Peter O'braian
• 2004-10-13: Found n = 232218, Peter O'braian
• 2004-06-16: Found n = 167375, Steven Harvey
• 2001-05-13: Found n = 72612, Steven Harvey