Generalized Woodall primes of the form n•81n-1

Current data

ASCII format : n*81^n-1 Base : 81 Count : 5 Max n : 400,000 Date : 2024-10-25

2, 20, 270, 508, 18248

History

• 2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
• 2023-07-23: Checked n = 4000 - 26000?, (puadz), double-check
• 2023-07-03: Reserved by (puadz), double-check
• 2014-03-13: Checked to n = 25000, Steven Harvey, double-check
• 2012-10-10: Checked to n = 25000, Thomas Ritschel
• 2012-03-22: Checked n = 300000 - 400000, Predrag Minovic, Thomas Ritschel
• 2012-01-11: Checked n = 150000 - 300000, Predrag Minovic, Thomas Ritschel
• 2011-11-27: Checked n = 26000? - 150000, Thomas Ritschel
• 2010-11-01: Checked n = 80 - 4000, Steven Harvey, double-check
• 2010-11-01: Reserved by Predrag Minovic, Thomas Ritschel to n = 150000
• 2004-02: Found n = 18248, Steven Harvey
• 2002-12: Checked n = 80 - 4096, Mark Rodenkirch