Riesel primes of the form 11•2n-1

Current data

k , b : 11 , 2 Type : Low Count : 27 Nash : 795 Max n : 8,000,000 Date : 2024-08-15

2, 26, 50, 54, 126, 134, 246, 354, 362, 950, 1310, 2498, 6926, 11826, 31734, 67850, 74726, 96150, 374114, 696438, 743322, 1044086, 1104606, 1261478, 4643238, 7971110, 11993994

Remarks :

The sequence A001772 in OEIS

History

• 2024-08-15: Found n = 11993994, Ryan Propper
• 2024-04-23: Reservation dropped, Thomas Ritschel
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-12-17: Checked n = 7500000 - 8000000, Thomas Ritschel
• 2019-11-25: Found n = 7971110, Thomas Ritschel
• 2019-09-28: Checked n = 7000000 - 7500000, Thomas Ritschel
• 2018-12-03: Checked n = 6650000 - 7000000, Thomas Ritschel
• 2018-04-11: Checked n = 6450000 - 6650000, Thomas Ritschel
• 2018-01-03: Checked n = 6250000 - 6450000, Thomas Ritschel
• 2017-08-03: Checked n = 6050000 - 6250000, Thomas Ritschel
• 2017-05-02: Checked n = 5850000 - 6050000, Thomas Ritschel
• 2017-01-01: Checked n = 5750000 - 5850000, Thomas Ritschel
• 2016-11-02: Checked n = 5600000 - 5750000, Thomas Ritschel
• 2016-08-21: Checked n = 5500000 - 5600000, Thomas Ritschel
• 2016-07-01: Checked n = 5400000 - 5500000, Thomas Ritschel
• 2016-06-04: Checked n = 5300000 - 5400000, Thomas Ritschel
• 2016-05-01: Checked n = 5200000 - 5300000, Thomas Ritschel
• 2016-04-03: Checked n = 5000000 - 5200000, Thomas Ritschel
• 2016-01-06: Checked n = 4800000 - 5000000, Thomas Ritschel
• 2015-11-02: Checked n = 4660000 - 4800000, Thomas Ritschel
• 2015-01-04: Checked n = 4300000 - 4660000, Thomas Ritschel
• 2014-03-31: Found n = 4643238, Thomas Ritschel
• 2014-02-28: Checked n = 4000000 - 4300000, Thomas Ritschel
• 2013-04-23: Checked n = 3320000 - 3499265, 3534855 - 4000000, Thomas Ritschel, n = 3499266 - 3534854 done previously by Peter Benson
• 2013-04-07: Checked n = 2440000 - 3000000, Michael Curtis, released
• 2012-10-30: Checked n = 3200000 - 3320000, Thomas Ritschel
• 2012-08-31: Checked n = 3100000 - 3200000, Thomas Ritschel
• 2012-07-23: Checked n = 3000000 - 3100000, Thomas Ritschel
• 2011-12-04: Checked n = 2410000 - 2440000, Michael Curtis
• 2011-06-02: Checked n = 2180000 - 2300000, 2400000 - 2410000, Michael Curtis
• 2011-06-02: Checked n = 2300000 - 2400000, Thomas Ritschel
• 2010-10-28: Checked n = 2100000 - 2180000, Michael Curtis
• 2010-03-21: Checked n = 1940000 - 2100000, Michael Curtis
• 2010-01-12: Checked n = 1880000 - 1940000, Michael Curtis
• 2009-09-01: Checked n = 1840000 - 1880000, Michael Curtis
• 2009-02-13: Checked n = 1600000 - 1840000, Michael Curtis
• 2009-01-18: Checked n = 3499266 - 3534854, Peter Benson
• 2009-01-09: Checked n = 950000 - 1058809, 1967610 - 2088566, 2366474 - 2387178, Peter Benson
• 2008-10-28: Checked n = 1550000 - 1600000, Michael Curtis
• 2008-07-14: Checked n = 1500000 - 1550000, Michael Curtis
• 2008-01-13: None, Michael Curtis
• 2007-11-21: None, Michael Curtis
• 2007-10-24: None, Michael Curtis
• 2007-09-10: Sieving, Michael Curtis
• 2007-06-06: Sieving, Michael Curtis
• 2007-05-09: Sieving, Michael Curtis
• 2007-02-13: Reserved by Michael Curtis
• 2006-11-23: Checked n = 1400000 - 1500000, Thomas Ritschel, released
• 2006-10-12: Checked n = 1340000 - 1400000, Thomas Ritschel
• 2006-04-27: Checked n = 1200000 - 1340000, Thomas Ritschel
• 2006-03-18: Found n = 1261478, Thomas Ritschel
• 2006-02-02: Checked n = 1080000 - 1200000, Thomas Ritschel
• 2005-10-09: Found n = 1104606, Thomas Ritschel
• 2005-10-05: Checked n = 1000000 - 1080000, Thomas Ritschel
• 2005-08-16: Found n = 1044086, Thomas Ritschel
• 2005-01-16: Checked n = 700000 - 1000000, Thomas Ritschel
• 2004-09-13: Found n = 743322, Thomas Ritschel
• 2004-08-31: Checked n = 600000 - 700000, Thomas Ritschel
• 2004-08-31: Found n = 696438, Thomas Ritschel
• 2004-08-05: Checked n = 500000 - 600000, Thomas Ritschel
• 2004-04-15: Checked n = 200000 - 500000, Thomas Ritschel, released
• 2004-04-06: Checked n = 150000 - 200000, Thomas Ritschel
• 2004-04-04: Checked n = 2 - 150000, Thomas Ritschel
• 2004-04-03: Found n = 374114, Thomas Ritschel
• 2004-04-02: Reserved by Thomas Ritschel, for n = 2 - 200000
• 1999-08-27: Found n = 96150, Michael J. Graef
• 1998-07-28: Found n = 31734, Wilfrid Keller
• 1994: Found n = 6926, Harvey Dubner