Generalized Woodall primes of the form n•18n-1

Current data

ASCII format : n*18^n-1 Base : 18 Count : 19 Max n : 1,600,000 Date : 2024-10-25

1, 2, 6, 8, 10, 28, 30, 39, 45, 112, 348, 380, 458, 585, 17559, 38751, 43346, 46984, 92711

Remarks :

The sequence A299381 in OEIS

History

• 2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
• 2023-08-10: none, Ryan Propper, released
• 2023-04-29: Checked n = 1000000 - 1600000, Ryan Propper
• 2023-04-19: Reserved by Ryan Propper to n = 1600000
• 2023-04-10: Checked n = 400000 - 1000000, Ryan Propper
• 2023-04-01: Reserved by Ryan Propper to n = 1000000
• 2016-02-08: Checked n = 250000 - 400000, Steven Harvey
• 2015-11-02: Reserved by Steven Harvey to n = 400000
• 2014-03-13: Checked to n = 25000, Steven Harvey, double-check
• 2012-10-10: Checked to n = 25000, Thomas Ritschel
• 2011-05-05: Checked n = 200000 - 250000, Steven Harvey
• 2011-03-06: Reserved by Steven Harvey to n = 250000
• 2010-11-01: Checked n = 17 - 4000, Steven Harvey, double-check
• 2009-03-13: Checked n = 40000 - 200000, Mark Rodenkirch
• 2009-01-31: Found n = 92711, Mark Rodenkirch
• 2008-12: Found n = 43346, Mark Rodenkirch
• 2008-12-11: Reserved by Mark Rodenkirch to n = 100000
• 2005-04-27: Found n = 46984, Peter Benson
• 2005-01-03: Checked n = 5000 - 10000, Mark Rodenkirch
• 2004-12-21: Reserved by Mark Rodenkirch to n = 10000
• 2004-12-21: Checked n = 17 - 5000, Mark Rodenkirch
• 2004-12-15: Reserved by Mark Rodenkirch to n = 6000
• 2004-12-03: Reserved by Mark Rodenkirch to n = 5000
• 2004-01-16: Found n = 38751, Steven Harvey
• 2002-08: Found n = 17559, Steven Harvey