Proth primes of the form 3125•2n+1

Current data

k , b : 3125 , 2 Count : 28 Nash : 1150 Max n : 3,486,000 Date : 2023-10-21

17, 29, 39, 123, 131, 143, 149, 167, 221, 303, 543, 593, 2331, 2823, 3401, 3843, 10637, 11199, 13769, 24293, 25407, 94073, 147089, 168927, 1583223, 2697651, 2867399, 3124079

History

• 2023-10-21: Checked n = 3322000 - 3486000, PrimeGrid Proth Mega Prime Search
• 2021-04-01: Checked to n = 3322000, PrimeGrid Fermat Divisor Search
• 2019-09-13: Found n = 3124079, Dave Sunderland, PrimeGrid Fermat Divisor Search
• 2019-09-11: Found n = 2867399, Ricky L Hubbard, PrimeGrid Fermat Divisor Search
• 2019-09-11: Found n = 2697651, Seonghwan Kim, PrimeGrid Fermat Divisor Search
• 2019-09-08: Found n = 1583223, Brian D. Niegocki, PrimeGrid Fermat Divisor Search
• 2019-09-06: Reserved by PrimeGrid Fermat Divisor Search from n=1550000
• ?: Checked to n = 1550000, PrimeGrid Proth Prime Search Extended
• 1998-03-11: Found n = 25407, Henri Lifchitz
• 1998-03-11: Found n = 24293, Henri Lifchitz
• 1994: Found n = 3843, Jeffrey Young
• 1994: Found n = 3401, Jeffrey Young