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

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Reserved! This sequence is currently reserved by: Mark Rodenkirch

Current data

Base :	7
Count :	3
Max `n` :	255,681
Date :	2023-05-01
Reserved :	Mark RodenkirchMark Rodenkirch/Reserved

34, 1980, 9898^[1]

Remarks :

The sequence A242177 in OEIS

Notes

↑ Proth 202•7⁹⁹⁰⁰+1

History

2023-05-01: Reserved by Mark Rodenkirch
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

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