Riesel primes of the form 503•2n-1

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

Current data

k , b : 503 , 2 Count : 55 Nash : 2610 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 6, 8, 12, 24, 26, 34, 42, 58, 62, 80, 110, 264, 270, 294, 394, 540, 744, 966, 1206, 1332, 1404, 1654, 1686, 2264, 3698, 3980, 4090, 5940, 9778, 12020, 15540, 18602, 19628, 23382, 55694, 77862, 105370, 112116, 115764, 237490, 278210, 284628, 287540, 295572, 300702, 342144, 387354, 634134, 674214, 989052, 1070448, 1092022, 1624064, 1838444

History

• 2022-05-11: Found n = 1838444, Oliver Kruse
• 2021-09-22: Found n = 1624064, Göran Schmidt
• 2012-01-09: Found n = 1092022, Vaughan Davies
• 2011-11-30: Found n = 1070448, Max Dettweiler
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-11-04: Found n = 989052, Karsten Bonath
• 2009-05-06: Found n = 674214, David James
• 2009-02-15: Found n = 634134, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-03-18: Found n = 387354, James P. Burt
• 2008-03-06: Found n = 300702, James P. Burt
• 2008-02-05: Found n = 342144, Carlos Eduardo Pinho
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-10-29: Found n = 237490, Steven Harvey
• 2003-03-18: Found n = 115764, Steven Harvey
• 2003-03-17: Found n = 112116, Steven Harvey
• 2002-11-20: Found n = 105370, Steven Harvey