Riesel primes of the form 645•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 645 , 2 Type : 315 Count : 42 Nash : 2887 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 2, 5, 7, 14, 29, 37, 40, 47, 82, 101, 112, 155, 461, 1099, 1795, 1949, 2759, 3427, 3697, 3874, 4456, 4858, 9074, 15325, 21041, 25120, 45631, 72815, 100417, 137822, 160450, 178048, 191050, 340424, 400441, 443719, 691682, 839560, 1122571, 1647887, 2148587

History

• 2023-12-31: Found n = 2148587, Göran Schmidt
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2021-12-19: Found n = 1647887, Timothy Sorbera
• 2012-04-18: Found n = 1122571, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2010-11-28: Found n = 839560, Brian Lody
• 2009-06-06: Found n = 691682, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-05-23: Found n = 443719, Timothy Sorbera
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-08: Found n = 400441, James P. Burt
• 2008-01-28: Found n = 340424, Karsten Bonath
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-10-15: Found n = 191050, Thomas Masser
• 2004-10-14: Found n = 178048, Thomas Masser
• 2002-12-12: Found n = 100417, Steven Harvey