Riesel primes of the form 393•2n-1

Reserved! This sequence is currently part of Multi Reservation 26: NPLB Drive 19.

Current data

k , b : 393 , 2 Type : 3 Count : 31 Nash : 1827 Max n : 3,100,000 Date : 2024-08-15 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 14, 59, 112, 118, 146, 235, 424, 478, 712, 742, 2494, 2611, 3082, 3466, 5102, 8866, 28480, 47080, 51892, 95882, 128584, 138662, 146440, 169646, 185584, 1095688, 1297402, 1583890, 2828738

History

• 2023-02-21: Found n = 2828738, Max Dettweiler
• 2022-06-03: Reserved by NPLB Drive 16, for 2000000<n<3000000
• 2014-08-20: Checked to n = 2000000, NPLB Mini Drive 5, released
• 2014-05-20: Found n = 1583890, Timothy Sorbera
• 2013-08-17: Reserved by NPLB Mini Drive 5, for 1300000<n<2000000
• 2011-01-20: Checked to n = 1300000, Ian M. Gunn, released
• 2011-01-17: Found n = 1297402, Ian M. Gunn
• 2010-12-11: Found n = 1095688, Ian M. Gunn
• 2010-09-01: Reserved by Ian M. Gunn, for 1000000<n<1300000
• 2009-03-28: Checked to n = 1000000, Ian M. Gunn, released
• 2009-03-20: Checked to n = 985000, Ian M. Gunn
• 2009-03-10: Checked to n = 780000, Ian M. Gunn
• 2009-02-04: Reserved by Ian M. Gunn for 600000<n<1000000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2002-08-02: Found n = 185584, Peter O'braian
• 2002-07-27: Found n = 169646, Peter O'braian
• 2002-07-27: Found n = 146440, Peter O'braian
• 2002-04-30: Found n = 138662, Peter O'braian
• 2002-04-29: Found n = 128584, Peter O'braian
• 2001-03-18: Found n = 95882, Kimmo Herranen