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Williams primes of the form 6•7ⁿ-1

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Revision as of 21:58, 3 December 2024 by Ikari (talk | contribs) (Searched to n = 250K.)

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Reserved! This sequence is currently reserved by: Riley Fisher

Current data

Base :	7
Count :	22
Max n :	250,000
Date :	2024-12-03
Reserved :	Riley FisherRiley Fisher/Reserved

1^[1], 2, 7, 18, 55, 69, 87, 119, 141, 189, 249, 354, 1586, 2135, 2865, 2930, 4214, 7167, 67485, 74402, 79326, 231349

Remarks :

The sequence A046866 in OEIS

Notes

↑ Twin n=1

History

2024-12-03: Checked to n = 250000, Riley Fisher
2024-12-02: Found n = 231349, Riley Fisher
2024-12-01: Reserved by Riley Fisher for n = 200000 - 250000
2015-11-13: Checked n = 80000 - 200000, Robert Price
2008-11-26: Checked n = 18000 - 80000, Donovan Johnson
2008-11-26: Found n = 67485, 74402, 79326, Donovan Johnson
2006-08-16: Checked n = 16000 - 18000, Sam Handler
2006-06-05: Checked n = 5650 - 16000, Ryan Propper
2006-06-05: Found n = 7167, Ryan Propper
2003-01-17: Checked n = 2000 - 5650, Robert G. Wilson
2003-01-17: Found n = 2135, 2865, 2930, 4214, Robert G. Wilson
2001-07-21: Checked n = 500 - 2000?, Jason Earls
2001-07-21: Found n = 1586, Jason Earls
1981: Checked n = 1 - 500, ?

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