Riesel primes of the form 127•2n-1

Reserved! This sequence is currently reserved by: Michael Curtis

Current data

k , b : 127 , 2 Type : Low Count : 8 Nash : 325 Max n : 7,100,000 Date : 2023-07-17 Reserved : Michael CurtisMichael Curtis/Reserved

25, 113, 39545, 170393, 220417, 1398889, 2346377, 6836153

Remarks :

This sequence is independently searched for n-values ≡ 0 mod 7. For related history, see Riesel 127•128n-1. See also Williams 127•128n-1

History

• 2023-07-17: Checked to n = 7100000, Michael Curtis
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2021-01-26: Checked to n = 17150000, Borys Jaworski only n == 0 mod 7
• 2020-03-13: Checked to n = 7100000, Michael Curtis
• 2018-06-25: Found n = 6836153, Michael Curtis
• 2017-07-03: Checked to n = 5600000, Michael Curtis
• 2016-01-03: Checked to n = 4420000, Michael Curtis
• 2015-04-01: Checked to n = 4150000, Michael Curtis
• 2014-10-05: Checked to n = 4000000, Michael Curtis
• 2013-06-11: Checked to n = 3700000, Michael Curtis
• 2012-10-03: Checked to n = 3700000, Michael Curtis
• 2010-10-28: none, Michael Curtis
• 2010-03-21: Checked to n = 3110000, Michael Curtis
• 2010-01-24: Checked to n = 2700000, Michael Curtis
• 2010-01-12: Checked to n = 2500000, Michael Curtis
• 2009-10-14: Checked to n = 2410000, Michael Curtis
• 2009-09-01: Checked to n = 2370000, Michael Curtis
• 2009-07-27: Found n = 2346377, Michael Curtis
• 2009-02-13: Checked to n = 2040000, Michael Curtis
• 2009-01-10: Checked to n = 2000000, Michael Curtis
• 2008-07-14: Checked to n = 1850000, Michael Curtis
• 2008-04-30: Checked to n = 1650000, Michael Curtis
• 2008-02-22: Checked to n = 1450000, Michael Curtis
• 2008-02-12: Found n = 1398889, Ed Goforth, Michael Curtis
• 2008-01-13: Checked to n = 1250000, Michael Curtis
• 2007-11-21: none, Michael Curtis
• 2007-10-24: Checked to n = 1200000, Michael Curtis
• 2007-09-10: Checked to n = 1120000, Michael Curtis
• 2007-08-24: Checked to n = 1100000, Michael Curtis
• 2007-07-30: Checked to n = 1020000, Michael Curtis
• 2007-04-11: Reserved by Michael Curtis to n=4000000
• 2007-01-13: Checked to n = 1000000, Michael Curtis, released
• 2006-11-06: Checked to n = 900000, Michael Curtis
• 2006-08-09: Checked to n = 700000, Michael Curtis
• 2006-05-11: Checked to n = 575000, Michael Curtis
• 2006-04-06: Reserved by Michael Curtis to n=1000000
• 2006-04-02: Checked to n = 230000, (none)
• 2006-04-02: Reservation dropped, (Chaos)
• 2005-09-20: Reserved by (Chaos)
• 2004-04-29: Reserved by Thomas Masser
• 1999-03-22: Found n = 220417, Tamer Güvenc
• 1999-03-08: Found n = 170393, Tamer Güvenc
• 1998-06-14: Found n = 39545, Wilfrid Keller