Riesel primes of the form 247•2n-1

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

Current data

k , b : 247 , 2 Type : Low Count : 7 Nash : 363 Max n : 2,300,000 Date : 2024-05-16 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

133, 277, 805, 2341, 68845, 952069, 1529485

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
• 2011-05-07: Checked to n = 2000000, James P. Burt
• 2011-05-03: Found n = 1529485, James P. Burt
• 2011-04-27: Reserved by James P. Burt
• 2006-02-21: Checked to n = 1046253, Larry Soule, released
• 2006-02-07: Found n = 952069, Larry Soule
• 2006-01-24: Checked to n = 850000, Larry Soule
• 2005-12-21: Reserved by Larry Soule
• 2005-01-19: Checked to n = 400000, Jocelyn Larouche, released
• 2005-01-15: Reserved by Jocelyn Larouche
• 2004-11-05: Checked n = 200000-230000, Steven Harvey, released
• 2004-04-29: Reserved by Thomas Masser
• 1999-12-13: Found n = 68845, Dale Andrews