Proth primes of the form 389•2n+1

Current data

k , b : 389 , 2 Count : 20 Nash : 1097 Max n : 5,000,000 Date : 2024-04-30

11, 57, 59, 115, 299, 347, 715, 3845, 5157, 16945, 27949, 66379, 142649, 233985, 572625, 976169, 1186577, 1824385, 2916499, 3019025

History

• 2024-04-30: Checked to n = 5000000, PrimeGrid Proth Prime Search
• 2021-05-01: Found n = 3019025, Stefan Larsson, PrimeGrid Proth Prime Search
• 2020-12-31: Found n = 2916499, William Hawkinson, PrimeGrid Proth Prime Search
• 2019-07: Checked n = 3322000 - 3640000, PrimeGrid Proth Mega Prime Search
• 2013-03-20: Found n = 1824385, Roman Krompolc, PrimeGrid Proth Prime Search
• 2011-12-05: Found n = 1186577, Justin Keenan, PrimeGrid Proth Prime Search
• 2011-01-16: Found n = 976169, Steven Harvey, PrimeGrid Proth Prime Search
• 2009-03-11: Found n = 572625, Eric Embling, PrimeGrid Proth Prime Search
• 2005-06-14: Found n = 233985, Steven Harvey
• 2002-04-22: Found n = 142649, Kirk Pearson
• 2000-10-13: Found n = 66379, Daval Davis
• 1998-06-19: Found n = 27949, David Hanson
• 1996-05: Found n = 16945, Patrick Demichel