Riesel primes of the form 685•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 685 , {{{Rb}}} Count : Attention! Parameter RCount=51 not given! Nash : 2581 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 7, 9, 13, 15, 19, 23, 31, 53, 59, 77, 83, 195, 211, 355, 429, 671, 839, 965, 1071, 1183, 1835, 2745, 2907, 9351, 9681, 10327, 10929, 22319, 28639, 31457, 48783, 98827, 131347, 150261, 161401, 197805, 300797, 340547, 371379, 398835, 461971, 593347, 706333, 792755, 814503, 1123361, 1378573, 1438521, 1446421, 1563423

[[Category:Riesel {{{Rb}}}|#.....00685]]

History

• 2016-11-29: Found n = 1446421, Max Dettweiler
• 2016-09-05: Found n = 1438521, Max Dettweiler
• 2014-11-25: Found n = 1378573, Lennart Vogel
• 2012-04-18: Found n = 1123361, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2010-11-17: Found n = 814503, Brian Lody
• 2010-11-12: Found n = 792755, Brian Lody
• 2009-08-04: Found n = 706333, Tore Zachariassen
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-12-17: Found n = 593347, Gary Barnes
• 2008-06-20: Found n = 461971, Glenn C. Kaiser
• 2008-03-30: Found n = 398835, Gary Barnes
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-12: 300797 confirmed, David James
• 2008-03-01: Found n = 371379, Max Dettweiler
• 2008-01-28: Found n = 340547, Karsten Bonath
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2005-01-20: Found n = 300797, Jean Penné
• 2004-12-24: Found n = 197805, Steven Harvey
• 2002-03-09: Found n = 98827, Kimmo Herranen