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Generalized Woodall primes of the form `n`•10ⁿ-1

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Revision as of 04:10, 5 October 2024 by Gd barnes (talk | contribs) (add history; found good history page, see link in remark)

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Reserved! This sequence is currently reserved by: Ryan Propper

Current data

ASCII format :	n*10^n-1
Base :	10
Count :	18
Max `n` :	1,600,000
Date :	2023-04-29
Reserved :	Ryan PropperRyan Propper/Reserved

2^[1], 3^[2], 8^[3], 11^[4], 15, 39, 60^[5], 72, 77, 117, 183, 252, 396, 1745, 2843, 4665, 5364, 524427^[6]

Remarks :

The sequence A059671 in OEIS
See early history at Generalized Woodall news.

Notes

History

2023-04-29: Checked n = 1000000 - 1600000, Ryan Propper
2023-04-19: Reserved by Ryan Propper to n = 1600000
2023-04-09: Checked n = 500000 - 1000000, Ryan Propper
2023-04-02: Found n = 524427, Ryan Propper
2023-04-01: Reserved by Ryan Propper to n = 1000000
2015-04-28: Checked n = 250000 - 500000, Steven Harvey
2015-03-25: Reserved by Steven Harvey for n = 250000 - 500000
2011-03-03: Checked n = 200000 - 250000, Steven Harvey
2011-01-31: Reserved by Steven Harvey for n = 200000 - 250000
2009-01-18: Checked n = 100000 - 200000, Mark Rodenkirch
2008-04-24: Checked n = 60000 - 100000, Steven Harvey
2004-10-26: Checked n = 50000 - 60000, Steven Harvey
2004-10-12: Reserved by Steven Harvey for n = 50000 - 60000
2000-02-07: Found n = 5364, Ray Ballinger
2000-02-05: Found n = 4665, Joe DeMaio
2000-02-04: Found n = 2843, Joe DeMaio
1997-03-03: Found n = 1745, Carlos Rivera

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