Riesel primes of the form 441•2n-1

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

Current data

k , b : 441 , 2 Type : 3 Count : 63 Nash : 2899 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 13, 19, 23, 35, 39, 45, 83, 151, 179, 181, 287, 293, 417, 499, 525, 663, 813, 839, 1301, 1327, 1337, 1375, 1409, 1837, 1863, 2735, 2765, 2777, 3487, 4617, 7279, 7679, 7903, 8431, 12421, 16589, 23115, 30355, 32735, 44819, 52027, 55695, 63317, 73969, 81027, 102959, 110789, 111223, 113833, 147577, 192897, 280133, 323913, 406179, 605849, 749693, 794409, 1021669, 1350261, 1422099, 2067233

History

• 2022-09-18: Found n = 2067233, 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
• 2015-08-07: Found n = 1422099, Timothy Sorbera
• 2014-07-12: Found n = 1350261, Johnathan Chu
• 2011-08-14: Found n = 1021669, Chris Chatfield
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-05-18: Found n = 794409, Gary Barnes
• 2010-04-02: Found n = 749693, Gary Barnes
• 2009-01-16: Found n = 605849, Timothy Sorbera
• 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
• 2008-03-06: 406179 confirmed, James P. Burt
• 2008-02-13: 323913 confirmed, 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
• 2005-10-02: Found n = 406179, Peter O'braian
• 2005-05-26: Found n = 323913, Peter O'braian
• 2005-03-21: Found n = 280133, Peter O'braian
• 2004-10-15: Found n = 192897, Steven Harvey
• 2002-12-10: Found n = 111223, Steven Harvey
• 2002-12-01: Found n = 113833, Steven Harvey
• 2002-12-01: Found n = 110789, Steven Harvey