Riesel primes of the form 621•2n-1

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

Current data

k , b : 621 , 2 Type : 3 Count : 46 Nash : 1795 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 11, 22, 23, 29, 34, 42, 59, 83, 101, 143, 238, 443, 474, 629, 718, 1293, 1374, 1854, 2477, 3274, 3323, 3819, 4317, 4653, 4882, 14291, 20094, 20123, 24109, 28663, 43211, 75477, 125494, 142523, 309834, 403853, 549331, 781254, 808038, 1127434, 1524287, 1535722, 1835567, 1865542, 2154597

History

• 2024-01-28: Found n = 2154597, 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
• 2022-12-18: Found n = 1865542, Max Dettweiler
• 2022-11-03: Found n = 1835567, Gary Barnes
• 2019-03-04: Found n = 1535722, Max Dettweiler
• 2018-09-15: Found n = 1524287, Göran Schmidt
• 2012-04-19: Found n = 1127434, Lennart Vogel
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2010-11-15: Found n = 808038, Brian Lody
• 2010-11-09: Found n = 781254, Scott Gilvey
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-11-16: Found n = 549331, Ian M. Gunn
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-19: Found n = 309834, Karsten Bonath
• 2008-03-09: Found n = 403853, 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
• 2003-07-30: Found n = 125494, Steven Harvey