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

Generalized Cullen primes of the form `n`•7ⁿ+1

From Prime-Wiki

Revision as of 21:29, 4 July 2023 by Ryanp (talk | contribs) (reserving base)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Jump to: navigation, search

Reserved! This sequence is currently reserved by: Ryan Propper

Current data

ASCII format :	n*7^n+1
Base :	7
Count :	4
Max `n` :	500,000
Date :	2023-05-28
Reserved :	Ryan PropperRyan Propper/Reserved

34, 1980, 9898^[1], 474280

Remarks :

The sequence A242177 in OEIS

Notes

↑ Proth 202•7⁹⁹⁰⁰+1

History

2023-05-28: Checked to n = 500000, Mark Rodenkirch
2023-05-28: Found n = 474280, Mark Rodenkirch
2023-04-28: Reserved by Mark Rodenkirch to n=500000
2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-checked
1998-11-13: Found n = 9898, Wilfrid Keller
1990-01-01: Found n = 1980, Harvey Dubner

Retrieved from "https://www.rieselprime.de/z/index.php?title=Cullen_prime_7&oldid=29079"