Proth primes of the form 643•2n+1

Reserved! This sequence is currently part of Multi Reservation 1: PrimeGrid Proth Prime Search.

Current data

k , b : 643 , 2 Count : 34 Nash : 1556 Max n : 3,070,000 Date : 2021-08-15 Reserved : PrimeGridPrimeGrid/Reserved

4, 10, 14, 40, 74, 124, 280, 346, 410, 604, 806, 2318, 3358, 4508, 4586, 5738, 7174, 13006, 26798, 36940, 38770, 39244, 51500, 59116, 157808, 237350, 318958, 368558, 371354, 782318, 1272644, 2078306, 3030650, 3501974

History

• 2018-03-28: Found n = 3501974, Stefan Larsson, PrimeGrid Proth Mega Prime Search
• 2021-05-07: Found n = 3030650, Brian D. Niegocki, PrimeGrid Proth Prime Search
• 2014-04-27: Found n = 2078306, Randall Scalise, PrimeGrid Proth Prime Search
• 2011-11-14: Found n = 1272644, Jim Foody, PrimeGrid Proth Prime Search
• 2010-03-10: Found n = 782318, Senji Yamashita, PrimeGrid Proth Prime Search
• 2007-09-27: Found n = 371354, Steven Harvey
• 2008-01-07: Found n = 368558, Steven Harvey
• 2005-04-25: Found n = 318958, Payam Samidoost
• 2005-08-01: Found n = 237350, Steven Harvey
• 1998-07-07: Found n = 26798, Tadashi Taura
• 1993: Found n = 7174, Harvey Dubner