Riesel primes of the form 239•2n-1

Reserved! This sequence is currently reserved by: Thomas Ritschel

Current data

k , b : 239 , {{{Rb}}} Count : Attention! Parameter RCount=7 not given! Nash : 388 Max n : 7,000,000 Date : 2020-06-22 Reserved : Thomas RitschelThomas Ritschel/Reserved

4, 92, 25780, 104956, 140116, 356300, 2421404

[[Category:Riesel {{{Rb}}}|#.....00239]][[Category:Riesel {{{Rb}}} Low-weight|#.....00239]]

History

• 2020-06-22: Checked to n = 7000000, Thomas Ritschel
• 2019-12-17: Checked to n = 6000000, Thomas Ritschel
• 2019-09-28: Checked to n = 5000000, Thomas Ritschel
• 2018-09-17: Found n = 2421404, Thomas Ritschel
• 2018-05-20: Reserved by Thomas Ritschel
• 2014-10-05: Checked to n = 2000000, Predrag Minovic, released
• 2013-07-09: Checked to n = 2000000, Predrag Minovic
• 2013-01-04: Checked to n = 1860000, Predrag Minovic
• 2012-07-02: Checked to n = 1500000, Predrag Minovic
• 2010-06-05: Checked to n = 1330000, Predrag Minovic
• 2010-05-04: Checked to n = 1290000, Predrag Minovic
• 2009-11-03: Checked to n = 1200000, Predrag Minovic
• 2008-10-19: Checked to n = 1010000, Predrag Minovic
• 2008-10-07: Reserved by Predrag Minovic
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-04-15: Found n = 356300, Larry Soule
• 1998-11-26: Found n = 25780, Wilfrid Keller