Proth primes of the form 3267•2n+1

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

Current data

k , b : 3267 , 2 Type : 3 Count : 40 Nash : 2071 Max n : 1,960,000 Date : 2024-05-14 Reserved : PrimeGridPrimeGrid/Reserved

6, 7, 10, 12, 19, 27, 34, 51, 307, 334, 358, 375, 408, 487, 507, 547, 570, 787, 1587, 1938, 2998, 5499, 10380, 12322, 12324, 14950, 20280, 22368, 34719, 35755, 73507, 87103, 101707, 102288, 140926, 355594, 846210, 976387, 2173170, 2305266

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
• 2019-09-09: Found n = 2305266, James Scott Brown, PrimeGrid Fermat Divisor Search
• 2019-09-09: Found n = 2173170, James Scott Brown, 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
• 2012-08-26: Found n = 976387, Lennart Vogel, PrimeGrid Proth Prime Search Extended
• 2012-05-02: Found n = 846210, Honza Cholt, PrimeGrid Proth Prime Search Extended
• 1997-12-14: Found n = 12324, Wendy Hecate Hartman