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Difference between revisions of "Woodall prime 9"

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Revision as of 06:19, 28 October 2024

Current data

ASCII format :	n*9^n-1
Base :	9
Count :	7
Max `n` :	975,000
Date :	2024-02-14

10^[1], 58^[2], 264^[3], 1568^[4], 4198^[5], 24500^[6], 4788920^[7]

Remarks :

The sequence A242202 in OEIS
See early history at Generalized Woodall news, Generalized Woodall primes, & Generalized Woodall completed ranges.

Notes

History

2024-02-14: Found n = 4788920, Ryan Propper, Serge Batalov
2014-07-09: Checked n = 250000 - 975000, Serge Batalov
2014-03-13: Checked to n = 25000, Steven Harvey, double-check
2012-10-10: Checked to n = 25000, Thomas Ritschel
2011-03-09: Checked n = 200000 - 250000, Steven Harvey
2011-01-31: Reserved by Steven Harvey for n = 200000 - 250000
2010-11-01: Checked n = 8 - 4000, Steven Harvey, double-check
2008-12-14: Checked n = 140000 - 200000, Mark Rodenkirch
2008-11-26: Reserved by Mark Rodenkirch to n = 200000
2008-11-26: Checked n = 100000 - 140000, Mark Rodenkirch
2007-02-08: Checked n = 60000 - 100000, Steven Harvey
2007-01-06: Reserved by Steven Harvey to n = 100000
2005-01-03: Checked n = 5000 - 10000, Mark Rodenkirch
2004-12-21: Reserved by Mark Rodenkirch to n = 10000
2004-12-21: Checked n = 8 - 5000, Mark Rodenkirch
2004-12-15: Reserved by Mark Rodenkirch to n = 6000
2004-12-03: Reserved by Mark Rodenkirch to n = 5000
2004-10-12: Checked to n = 60000, Steven Harvey
2004-10-06: Reserved by Steven Harvey to n = 60000
2000-06-03: Found n = 24500, Ray Ballinger
2000-02-05: Found n = 4198, Joe DeMaio

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Woodall prime