Riesel primes of the form 39•2n-1

Current data

k , b : 39 , 2 Type : 3 Count : 28 Nash : 1213 Max n : 5,482,000 Date : 2024-03-18

3, 24, 105, 153, 188, 605, 795, 813, 839, 2135, 2619, 4053, 8333, 15519, 16025, 16505, 30684, 40700, 43683, 52233, 142205, 222345, 225333, 292839, 322613, 747219, 781220, 2251104

Remarks :

The sequence A050545 in OEIS

History

• 2024-03-18: none, Michael Kwok, released
• 2022-07-10: Checked n = 5256000 - 5482000, Michael Kwok, results included
• 2021-05-05: Checked n = 4848000 - 5256000, Michael Kwok, results included
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-05-24: Checked n = 4750000 - 4848000, Michael Kwok, results included
• 2018-12-30: Checked n = 4520000 - 4750000, Michael Kwok, results included
• 2017-09-27: Checked n = 4310000 - 4520000, Michael Kwok, results included
• 2017-06-22: Checked n = 4050000 - 4310000, Michael Kwok, results included
• 2017-04-29: More results, Michael Kwok
• 2017-04-29: Checked n = 2000000 - 4050000, Michael Kwok, results included
• 2015-11-11: Found n = 2251104, Michael Kwok
• 2013-10-06: Reserved by Michael Kwok from n = 2000000
• 2013-10-05: Checked to n = 2000000, Larry Soule
• 2013-10-02: none, Larry Soule, skipped n = 1263000 - 1700000, later determined incorrect
• 2013-10-02: Checked n = 1700000 - 2000000, Larry Soule
• 2013-10-02: Reserved by Michael Kwok
• 2013-10-01: none, Larry Soule, released
• 2012-03-26: none, Larry Soule, working on n = 1700000 - 2000000
• 2009-07-26: Checked to n = 1706204, Larry Soule ?, See limit at RPS other completed ranges.
• 2009-01-09: Checked n = 950000 - 1006454, 1140023 - 1151796, 1430024 - 1431453, 1652079 - 1706204, 1967625 - 1983908, Peter Benson
• 2008-02-05: Checked n = 1220000 - 1263000, Larry Soule
• 2007-12-13: Checked n = 1135000 - 1220000, Larry Soule
• 2007-09-10: Checked n = 891000 - 1135000, Larry Soule
• 2006-12-01: Checked n = 831000 - 891000, Larry Soule
• 2006-10-13: Checked n = 750000 - 831000, Larry Soule
• 2006-09-17: Found n = 781220, Larry Soule
• 2006-09-05: Checked n = 730000 - 750000, Larry Soule
• 2006-07-12: Found n = 747219, Larry Soule
• 2006-07-05: Checked n = 580000 - 730000, Larry Soule
• 2006-05-31: Checked n = 500000 - 580000, Larry Soule
• 2006-04-30: Reserved by Larry Soule from n = 500000
• 2004-07-01: Checked n = 475000 - 500000, Thomas Ritschel, released
• 2004-06-18: Checked n = 380000 - 475000, Thomas Ritschel
• 2004-05-26: Checked n = 226000 - 380000, Thomas Ritschel
• 2004-05-15: Found n = 322613, Thomas Ritschel
• 2004-05-11: Found n = 292839, Thomas Ritschel
• 2004-05-04: Checked n = 1 - 226000, Thomas Ritschel
• 2004-05-04: Found n = 225333, Thomas Ritschel
• 2004-05-04: Found n = 222345, Thomas Ritschel
• 2004-04-28: Reserved by Thomas Ritschel
• 2003-10-01: Found n = 142205, Richard Kapek
• 1998-11-08: Found n = 52233, Kimmo Herranen
• 1998-11-05: Found n = 43683, Kimmo Herranen
• 1998-11-04: Found n = 40700, Kimmo Herranen
• 1998-07-28: Found n = 30684, Wilfrid Keller
• 1998-04-11: Found n = 16025, Ray Ballinger