Riesel primes of the form 361•2n-1

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

Current data

k , b : 361 , 2 Count : 40 Nash : 1627 Max n : 3,100,000 Date : 2024-08-15 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 5, 9, 11, 17, 35, 45, 57, 71, 119, 131, 273, 393, 477, 489, 497, 1361, 1539, 2201, 2693, 3585, 4305, 6149, 8205, 8793, 8997, 9611, 10935, 13853, 15323, 22277, 23045, 26475, 27845, 36897, 163917, 197475, 1033973, 1043099, 1346489

History

• 2023-03-07: Reserved by NPLB Drive 19, for 3000000<n<4000000
• 2023-03-07: Checked to n = 3000000, NPLB Drive 16, released
• 2022-06-03: Reserved by NPLB Drive 16, for 2000000<n<3000000
• 2014-12-28: Checked to n = 2000000, NPLB Maxi Drive 1, released
• 2014-08-20: Reserved by NPLB Maxi Drive 1, for 1610000<n<2000000
• 2013-06-19: Found n = 1346489, Ian M. Gunn
• 2013-04-28: Reserved by NPLB Maxi Drive 1, for 1300000<n<2000000
• 2013-02-09: Found n = 1043099, Ian M. Gunn
• 2013-02-07: Found n = 1033973, Ian M. Gunn
• 2013-04-28: Reserved by NPLB Maxi Drive 1, for 1300000<n<2000000
• 2013-01-14: Reserved by NPLB Maxi Drive 1, for 1000000<n<1300000
• 2009-08-12: Reserved by NPLB Mini Drive 4, for 900000<n<1000000
• 2009-06-18: Reserved by NPLB Mini Drive 4, for 800000<n<900000
• 2009-05-29: Reserved by NPLB Mini Drive 4, for 700000<n<800000
• 2009-05-09: Checked to n = 700000, Gary Barnes, released
• 2009-05-05: Checked to n = 682000, Gary Barnes
• 2009-05-01: Checked to n = 670000, Gary Barnes
• 2009-04-27: Checked to n = 640000, Gary Barnes
• 2009-04-15: Reserved by Gary Barnes, for 620000<n<700000
• 2009-04-13: Checked to n = 620000, Karsten Bonath, released
• 2009-03-15: Reserved by Karsten Bonath, for 600000<n<620000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2004-10-05: Found n = 197475, Steven Harvey
• 2004-04-29: Found n = 163917, Steven Harvey