Riesel primes of the form 83•2n-1

Reserved! This sequence is currently reserved by: Erling Bergþórsson

Current data

k , b : 83 , 2 Count : 53 Nash : 2056 Max n : 4,300,000 Date : 2024-02-24 Reserved : Erling BergþórssonErling Bergþórsson/Reserved

2, 4, 8, 10, 14, 18, 22, 24, 26, 28, 36, 42, 58, 64, 78, 158, 198, 206, 424, 550, 676, 904, 1276, 1374, 1536, 1642, 2124, 2796, 5266, 5318, 8828, 11638, 22968, 35836, 53348, 55808, 79826, 105282, 112418, 129804, 144456, 216954, 624398, 654488, 791926, 851092, 910716, 1192950, 1437882, 1455358, 1461350, 1540750, 2411962

History

• 2024-02-24: Checked n = 4100000 - 4300000, Erling Bergþórsson
• 2023-01-01: Checked n = 4000000 - 4100000, Erling Bergþórsson
• 2022-07-31: Checked n = 3800000 - 4000000, Erling Bergþórsson
• 2022-01-02: Checked n = 3700000 - 3800000, Erling Bergþórsson
• 2021-11-14: Checked n = 3600000 - 3700000, Erling Bergþórsson
• 2021-07-27: Checked n = 3500000 - 3600000, Erling Bergþórsson
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-10-29: Checked n = 3400000 - 3500000, Erling Bergþórsson
• 2020-07-25: Checked n = 3300000 - 3400000, Erling Bergþórsson
• 2020-05-28: Checked n = 3200000 - 3300000, Erling Bergþórsson
• 2020-04-13: Checked n = 3100000 - 3200000, Erling Bergþórsson
• 2020-03-04: Checked n = 3060000 - 3100000, Erling Bergþórsson
• 2020-02-07: Checked n = 3020000 - 3060000, Erling Bergþórsson
• 2019-11-30: Checked n = 3000000 - 3020000, Erling Bergþórsson
• 2019-02-15: Reserved by Erling Bergþórsson from n = 3000000
• 2018-07-16: Checked n = 2000000 - 3000000, David Metcalfe, released
• 2018-05-02: Found n = 2411962, David Metcalfe
• 2018-02-18: Reserved by David Metcalfe
• 2013-05-23: Checked n = 1600000 - 2000000, Peter Benson, released
• 2013-05-11: Reserved by Peter Benson from n = 1600000
• 2011-10-31: Checked n = 1490000 - 1600000, David Metcalfe, released
• 2011-10-10: Found n = 1540750, David Metcalfe
• 2011-10-04: Checked n = 1200000 - 1490000, David Metcalfe
• 2011-09-27: Found n = 1461350, David Metcalfe
• 2011-09-27: Found n = 1455358, David Metcalfe
• 2011-09-27: Found n = 1437882, David Metcalfe
• 2011-09-19: Reserved by David Metcalfe from n = 1200000
• 2010-12-23: Checked n = 1130000 - 1200000, Borys Jaworski, released
• 2010-12-23: Found n = 1192950, Borys Jaworski
• 2010-11-30: Checked n = 1120000 - 1130000, Borys Jaworski
• 2010-11-23: Reserved by Borys Jaworski from n = 1120000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n = 1120000 - 5000000
• 2009-07-26: Checked to n = 1120000, (?), See limit at RPS other completed ranges.
• 2009-01-09: Checked n = 950000 - 975235, Peter Benson
• 2008-03-22: Found n = 910716, Mark Anderson
• 2008-02-24: Checked n = 550000 - 780000, Predrag Minovic
• 2008-02-23: Found n = 791926, Ed Goforth, Predrag Minovic
• 2007-09-12: Found n = 654488, Predrag Minovic
• 2007-08-27: Found n = 624398, Predrag Minovic
• 2007-08-16: Found n = 851092, Peter Benson
• 2007-06-08: Reserved by Predrag Minovic for n = 550000 - 1120000
• 2006-10-17: Checked n = 543000 - 550000, Predrag Minovic
• 2006-10-13: Checked n = 536000 - 543000, Predrag Minovic
• 2006-09-13: Checked n = 450000 - 536000, Tony Galvan, released
• 2006-08-23: Checked n = 400000 - 450000, Tony Galvan
• 2006-08-13: Reserved by Tony Galvan
• 2004-12-24: Checked n = 260000 - 400000, Predrag Minovic, released
• 2004-12-04: Checked n = 210000 - 260000, Predrag Minovic
• 2004-11-27: Found n = 216954, Predrag Minovic
• 2004-08-03: Checked n = 200000 - 210000, Steven Harvey, released
• 2004-08-01: Reserved by Steven Harvey for n = 200000 - 210000
• 2004-06-23: Checked n = 1 - 200000, Steven Harvey
• 2004-06-17: Reserved by Steven Harvey to n = 200000
• 2000-09-25: Found n = 55808, Tom Kuechler
• 2000-09-25: Found n = 53348, Tom Kuechler
• 1999-01-07: Found n = 35836, Tom Kuechler
• 1999-01-07: Found n = 22968, Tom Kuechler
• 1984: Found n = 5318, Wilfrid Keller