Riesel primes of the form 409•2n-1

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

Current data

k , b : 409 , 2 Count : 35 Nash : 1205 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 11, 13, 41, 45, 65, 75, 411, 675, 815, 1095, 1137, 1273, 2091, 2217, 2981, 3505, 4605, 8041, 16215, 35781, 35795, 42347, 42867, 43733, 44187, 47577, 101561, 103793, 129185, 145681, 167885, 599013, 606805, 998261

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-11-05: Found n = 998261, Gary Barnes
• 2008-12-25: Found n = 606805, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-12-13: Found n = 599013, Kent McArthur
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2003-08-26: Found n = 167885, Peter O'braian
• 2003-08-18: Found n = 145681, Peter O'braian
• 2003-06-09: Found n = 129185, Steven Harvey
• 2001-03-14: Found n = 103793, Kimmo Herranen
• 2001-03-14: Found n = 101561, Kimmo Herranen