Currently there may be errors shown on top of a page, because of a missing Wiki update (PHP version and extension DPL3).

Navigation

Topics

Help • Register • News • History • How to • Sequences statistics • Template prototypes

Proth primes of the form 4•5ⁿ+1

From Prime-Wiki

Jump to: navigation, search

Current data

`k` , `b` :	4 , 5
Count :	20
Nash :	1822
Max `n` :	700,000
Date :	2024-11-08

2, 6, 18, 50, 290, 2582, 20462, 23870, 26342, 31938, 38122, 65034, 70130, 245538, 851878, 1052422, 1496566, 5380542, 8431178, 11786358

Remarks :

The sequence A204322 in OEIS
All primes are Generalized Fermat numbers
See also Williams 4•5ⁿ+1

History

2024-11-08: Checked n = 300000 - 700000, Gary Barnes, released
2024-10-01: Found n = 11786358, Ryan Propper
2024-01-02: Found n = 8431178, Ryan Propper
2023-02-22: Found n = 5380542, Ryan Propper
2023-02-14: none, Harsh Aggarwal, released
2023-02-13: Found n = 1496566, Ryan Propper
2023-02-13: Found n = 1052422, Ryan Propper
2023-02-13: Found n = 851878, Ryan Propper
2023-02-08: Reserved by Harsh Aggarwal
2015-01-16: Checked n = 2000? - 300000, Robert Price
2012-01-14: Found n = 2582, T. D. Noe
2012-01-14: Checked n = 1 - 2000, José María Grau Ribas
2004-05-10: Found n = 70130, Peter Benson
2000-07-18: Found n = 20462, Roberto E. Martinez

Retrieved from "https://www.rieselprime.de/z/index.php?title=Proth_prime_5_4&oldid=36455"