Proth primes of the form 26•3n+1

Reserved! This sequence is currently reserved by: Paul Vanderveen

Current data

k , b : 26 , 3 Count : 59 Nash : 3752 Max n : 1,000,000 Date : 2021-03-07 Reserved : Paul VanderveenPaul Vanderveen/Reserved

1, 12, 15, 17, 20, 29, 31, 32, 35, 37, 77, 95, 193, 203, 224, 296, 481, 501, 1069, 1151, 1224, 1248, 1657, 2103, 2121, 2971, 3487, 5433, 8179, 8593, 9804, 10524, 13841, 15943, 21060, 22869, 36691, 38984, 49347, 56257, 67481, 68959, 77393, 107760, 133052, 153841, 165483, 182141, 232935, 250399, 261516, 387984, 404559, 652929, 727825, 1435875, 1565545, 1700041, 1910099

Remarks :

See also Williams 26•27n+1

History

• 2021-03-07: Checked to n = 1000000, Paul Vanderveen
• 2020-12-29: Checked to n = 900000, Paul Vanderveen
• 2020-10-16: Found n = 1910099, Paul Vanderveen
• 2020-10-16: Checked to n = 810000, Paul Vanderveen
• 2020-09-14: Checked to n = 750000, Paul Vanderveen
• 2020-08-03: Found n = 1565545, Paul Vanderveen
• 2020-08-02: Checked to n = 650000, Paul Vanderveen
• 2020-07-13: Found n = 1700041, Paul Vanderveen
• 2020-07-05: Found n = 1435875, Paul Vanderveen
• 2020-07-01: Checked to n = 525000, Paul Vanderveen
• 2020-06-08: Checked to n = 400000, Paul Vanderveen
• 2020-05-24: Reserved by Paul Vanderveen
• 2020-05-22: Checked to n = 100000, Karsten Bonath
• 2006-09-24: Found n = 182141, Peter Benson
• 2006-05-02: Found n = 165483, Peter Benson
• 2005-05-02: Found n = 153841, Peter Benson
• 2004-10-22: Found n = 133052, Peter Benson
• 2004-03-09: Found n = 107760, Peter Benson
• 1998-11-21: Found n = 15943, David Hanson
• 1994: Found n = 2121, Wilfrid Keller