Proth primes of the form 1323•2n+1

Reserved! This sequence is currently part of Multi Reservation 25: PrimeGrid Proth Prime Search Extended.

Current data

k , b : 1323 , 2 Type : 3 Count : 73 Nash : 3226 Max n : 2,000,000 Date : 2024-10-15 Reserved : PrimeGridPrimeGrid/Reserved

1, 4, 5, 6, 13, 14, 26, 33, 45, 49, 52, 61, 69, 88, 101, 106, 168, 169, 242, 253, 261, 641, 734, 969, 1005, 1022, 1026, 1233, 1624, 2002, 2041, 2644, 3041, 3734, 4461, 4702, 5410, 5802, 6702, 7413, 13906, 20354, 22648, 23221, 23454, 25614, 29281, 31382, 34306, 56450, 71721, 72292, 72828, 90221, 99098, 128801, 229660, 284578, 316882, 319681, 539164, 543782, 587593, 874818, 889845, 933893, 1019980, 1051465, 1064161, 1325561, 2186806, 2205832, 2764024

Remarks :

Odd n only is currently being searched for n<3322000.

History

• 2023-10-21: Checked n = 3322000 - 3486000, PrimeGrid Proth Mega Prime Search
• 2019-09-24: Checked n = 1550000 - 3322000, PrimeGrid Fermat Divisor Search, even n-values only
• 2019-09-16: Found n = 2764024, Vince Splain, PrimeGrid Fermat Divisor Search
• 2019-09-09: Found n = 2205832, Bryan Little, PrimeGrid Fermat Divisor Search
• 2019-09-09: Found n = 2186806, Alan E. Monroe, PrimeGrid Fermat Divisor Search
• 2019-09-06: Reserved by PrimeGrid Fermat Divisor Search from n=1550000 even n-values only
• ?: Checked to n = 1550000, PrimeGrid Proth Prime Search Extended
• 2015-01-10: Found n = 1325561, Randall Scalise, PrimeGrid Proth Prime Search Extended
• 2013-03-02: Found n = 1064161, Brad Johnston, PrimeGrid Proth Prime Search Extended
• 2013-02-26: Found n = 1051465, Douglas B. McKay, PrimeGrid Proth Prime Search Extended
• 2012-10-08: Found n = 1019980, Andrei Ryjkov, PrimeGrid Proth Prime Search Extended
• 2012-07-07: Found n = 933893, Magnus Bergman, PrimeGrid Proth Prime Search Extended
• 2012-06-04: Found n = 889845, Darryl Hemsley, PrimeGrid Proth Prime Search Extended
• 2012-05-20: Found n = 874818, Adrian Reber, PrimeGrid Proth Prime Search Extended
• 2010-12-03: Found n = 587593, Frank Schneider, PrimeGrid Proth Prime Search Extended
• 2010-08-17: Found n = 543782, Fred Richard, PrimeGrid Proth Prime Search Extended
• 2010-08-06: Found n = 539164, Sean Faith, PrimeGrid Proth Prime Search Extended
• 2006-03-17: Found n = 319681, Peter Benson
• 2006-03-05: Found n = 284578, Peter Benson
• 2006-03-04: Found n = 316882, Peter Benson
• 2005-08-26: Found n = 229660, Peter Benson
• 1998-12-11: Found n = 31382, Tadashi Taura
• 1998-12-11: Found n = 29281, Tadashi Taura
• 1998-12-11: Found n = 25614, Tadashi Taura
• 1998-09-13: Found n = 20354, Ray Ballinger
• 1996: Found n = 23221, Patrick Demichel
• 1996: Found n = 22648, Patrick Demichel
• 1996-05-01: Found n = 7413, Patrick Demichel
• 1996-03: Found n = 6702, Patrick Demichel