Riesel primes of the form 293•2n-1

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

Current data

k , b : 293 , 2 Count : 21 Nash : 1483 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 26, 34, 66, 124, 560, 600, 1344, 1714, 1904, 5200, 7602, 10344, 63484, 196258, 213346, 243698, 421330, 517242, 1775450, 2791482

History

• 2024-11-22: Found n = 2791482, Florian Piesker, NPLB K300 Drive 1
• 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
• 2015-04-01: Checked to n = 2000000, Thomas Ritschel, released
• 2015-03-24: Reserved by Thomas Ritschel for 1850000 < n < 2000000
• 2014-10-05: Checked to n = 1850000, Predrag Minovic, released
• 2014-01-29: Found n = 1775450, Predrag Minovic
• 2013-09-08: Checked to n = 1650000, Predrag Minovic
• 2013-07-09: Checked to n = 1620000, Predrag Minovic
• 2013-02-01: Reserved by Predrag Minovic for 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 for n >= 1000000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1000000-5000000
• 2008-10-22: Checked to n = 1000000, NPLB Drive 4, released
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-12-16: Checked to n = 600000, RPS Drive 4, released
• 2006-09-28: Found n = 517242, Predrag Minovic, RPS Drive 4
• 2006-09-28: Found n = 421330, John Schlesser, RPS Drive 4
• 2006-07-28: Reserved by RPS Drive 4, for n = 260000 - 600000
• 2005-04-11: Found n = 243698, James S. Griffin
• 2005-01-22: Found n = 213346, Steven Harvey
• 2002-01-14: Found n = 196258, Janusz Szmidt
• 2000-05-17: Found n = 63484, Phil Carmody