Riesel primes of the form 561•2n-1

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

Current data

k , b : 561 , 2 Type : 3 Count : 36 Nash : 1920 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 7, 14, 26, 31, 38, 70, 238, 493, 583, 877, 907, 1330, 2573, 2605, 3055, 3398, 4181, 8918, 13793, 15449, 21497, 41098, 55486, 83986, 101326, 115081, 166274, 271550, 323165, 351074, 515702, 520850, 546613, 900097, 1805767

History

• 2022-04-30: Found n = 1805767, Florian Piesker
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-08-30: Found n = 900097, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-11-13: Found n = 546613, Ian M. Gunn
• 2008-08-07: Found n = 515702, Gary Barnes
• 2008-06-22: Found n = 520850, Lennart Vogel
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-02-14: Found n = 351074, 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
• 2002-06-21: Found n = 166274, Marcin Lipinski
• 2002-06-12: Found n = 101326, Marcin Lipinski
• 1998-11-15: Found n = 115081, Kimmo Herranen
• 1998-11-12: Found n = 55486, Joe Eversole
• 1998-11-07: Found n = 41098, Joe Eversole
• 1998-11-03: Found n = 21497, Thomas Nokleby