Riesel primes of the form 277•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

k , b : 277 , 2 Type : Low Count : 20 Nash : 865 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

5, 21, 101, 105, 333, 461, 933, 1041, 2157, 3321, 5177, 5513, 5781, 9737, 11505, 16457, 17357, 490805, 937325, 1583097

History

• 2024-04-23: Reserved by NPLB K300 Drive 1 for n > 2000000
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2013-03-10: Checked to n = 2000000, Thomas Ritschel, released
• 2013-02-09: Found n = 1583097, Thomas Ritschel
• 2013-02-01: Reserved by Thomas Ritschel from n=1300000
• 2012-05-14: Checked to n = 1300000, James P. Burt, released
• 2011-12-31: Checked to n = 1100000, James P. Burt
• 2011-12-10: Reserved by James P. Burt from n=1000000
• 2009-11-20: Checked to n = 1000000, Predrag Minovic released
• 2009-06-23: Checked to n = 950000, Predrag Minovic
• 2009-06-16: Found n = 937325, Predrag Minovic
• 2009-02-13: Checked to n = 920000, Predrag Minovic
• 2008-02-24: Checked to n = 885000, Predrag Minovic
• 2006-10-13: Checked to n = 744000, Predrag Minovic
• 2006-04-09: Found n = 490805, Predrag Minovic
• 2006-03-04: Reserved by Predrag Minovic