Riesel primes of the form 93•2n-1

Reserved! This sequence is currently part of Multi Reservation 4: NPLB K300 Drive 2.

Current data

k , b : 93 , 2 Type : 3 Count : 45 Nash : 2149 Max n : 3,100,000 Date : 2025-03-12 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 4, 7, 10, 15, 18, 19, 24, 27, 39, 60, 84, 111, 171, 192, 222, 639, 954, 2400, 2587, 4012, 4359, 5250, 6012, 6183, 7344, 10603, 12403, 13215, 29154, 78192, 81294, 103744, 107991, 174412, 176479, 203728, 205158, 251199, 362268, 580482, 903187, 990684, 2602483, 2708718

History

• 2025-02-27: Reserved by NPLB K300 Drive 2 from n = 3000000
• 2024-04-23: Reservation dropped, Michael Curtis
• 2023-07-17: Checked n = 2630000 - 3000000, Michael Curtis
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-03-13: Checked n = 2600000 - 2630000, Michael Curtis
• 2017-07-03: Checked n = 2270000 - 2600000, Michael Curtis
• 2016-11-04: Found n = 2708718, Michael Curtis
• 2016-08-27: Found n = 2602483, Michael Curtis
• 2016-01-03: Checked n = 1720000 - 2270000, Michael Curtis
• 2015-04-01: Checked n = 1650000 - 1720000, Michael Curtis
• 2014-10-05: Checked n = 1630000 - 1650000, Michael Curtis
• 2014-03-07: Checked n = 1600000 - 1630000, Michael Curtis
• 2013-12-07: Checked n = 1530000 - 1600000, Michael Curtis
• 2013-09-04: Checked n = 1480000 - 1530000, Michael Curtis
• 2013-06-11: Checked n = 1400000 - 1480000, Michael Curtis
• 2011-12-04: Checked n = 1290000 - 1400000, Michael Curtis
• 2011-06-02: Checked n = 1200000 - 1290000, Michael Curtis
• 2010-10-21: none, Michael Kwok, released
• 2010-10-20: Reserved by Michael Curtis
• 2010-09-28: Reserved by Michael Kwok
• 2009-01-30: Checked n = 1150000 - 1200000, Michael Curtis, released
• 2009-01-09: Checked n = 950000 - 970502, Peter Benson
• 2008-10-28: Checked n = 980000 - 1150000, Michael Curtis
• 2008-09-15: Found n = 990684, Michael Curtis
• 2008-07-14: none, Michael Curtis
• 2008-04-30: Checked n = 890000 - 980000, Michael Curtis
• 2008-03-15: none, Michael Curtis
• 2008-02-22: Checked n = 860000 - 890000, Michael Curtis
• 2008-01-17: Found n = 903187, Michael Curtis
• 2008-01-13: Checked n = 850000 - 860000, Michael Curtis
• 2008-01-07: none, Michael Curtis
• 2007-11-21: none, Michael Curtis
• 2007-10-24: Checked n = 710000 - 850000, Michael Curtis
• 2007-09-10: Checked n = 680000 - 710000, Michael Curtis
• 2007-07-30: none, Michael Curtis
• 2007-07-18: Checked n = 600000 - 680000, Michael Curtis
• 2007-06-06: none, Michael Curtis
• 2007-05-09: none, Michael Curtis
• 2007-04-11: Checked n = 582500 - 600000, Michael Curtis
• 2007-01-21: Checked n = 555000 - 582500, Ingmar Goudt, released
• 2007-01-19: Reserved by Michael Curtis
• 2007-01-19: Found n = 580482, Ingmar Goudt
• 2006-12-02: Checked n = 400000 - 555000, Ingmar Goudt
• 2006-06-05: Checked n = 355000 - 400000, Ingmar Goudt
• 2006-03-05: Found n = 362268, Ingmar Goudt
• 2006-02-22: Checked n = 309000 - 355000, Ingmar Goudt
• 2005-12-06: Checked n = 290000 - 309000, Ingmar Goudt
• 2005-10-05: Checked n = 250000 - 290000, Ingmar Goudt
• 2005-08-16: Found n = 251199, Ingmar Goudt
• 2005-08-11: Checked n = 210000 - 250000, Ingmar Goudt
• 2005-07-02: Reserved by Ingmar Goudt
• 2005-01-10: Checked n = 200000 - 210000, Steven Harvey, released
• 2005-01-05: Found n = 205158, Steven Harvey
• 2005-01-05: Found n = 203728, Steven Harvey
• 2005-01-04: Reserved by Steven Harvey for n = 200000 - 210000
• 2004-07-06: Checked n = 74595 - 200000, Steven Harvey, released
• 2004-07-06: Found n = 176479, Steven Harvey
• 2004-07-06: Found n = 174412, Steven Harvey
• 2004-06-30: Reserved by Steven Harvey to n = 200000
• 1999-04-13: Found n = 29154, Tom Kuechler
• 1994: Found n = 7344, Harvey Dubner