Riesel primes of the form 551•2n-1

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

Current data

k , b : 551 , 2 Count : 24 Nash : 1047 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 34, 66, 162, 226, 442, 778, 1238, 2882, 3058, 3582, 6522, 11002, 11366, 27726, 44066, 56066, 87806, 92454, 140698, 1501694, 1583718, 1671546, 2051922

History

• 2022-09-07: Found n = 2051922, Florian Piesker
• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-02-20: Found n = 1671546, Gary Barnes
• 2018-12-04: Found n = 1583718, Dmitry Domanov
• 2017-07-29: Found n = 1501694, Timothy Sorbera
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 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
• 2004-01-04: Found n = 140698, Steven Harvey
• 2001-12-20: Found n = 92454, Kimmo Herranen
• 2001-12-20: Found n = 87806, Kimmo Herranen