Generalized Woodall primes of the form n•7n-1

Current data

ASCII format : n*7^n-1 Base : 7 Count : 8 Max n : 1,000,000 Date : 2024-10-07

2, 18, 68, 84, 3812, 14838, 51582, 465762

Remarks :

The sequence A242200 in OEIS See early history at Generalized Woodall news, Generalized Woodall primes, & Generalized Woodall completed ranges.

History

• 2024-10-07: Checked n = 500000 - 1000000, Richard Kapek, released
• 2024-08-23: Checked n = 350000 - 500000, Richard Kapek
• 2024-08-19: Found n = 465762, Richard Kapek
• 2024-08-19: Reserved by Richard Kapek for n = 350000 - 500000
• 2024-08-19: Reserved by Richard Kapek for n = 500000 - 1000000
• 2024-08-16: Reservation dropped, Dylan Delgado
• 2023-04-05: Reserved by Dylan Delgado to n = 500000
• 2014-03-13: Checked to n = 25000, Steven Harvey, double-check
• 2012-10-10: Checked to n = 25000, Thomas Ritschel
• 2012-03-18: Reserved by James P. Burt to n = 500000
• 2012-03-18: Checked n = 290000 - 350000, James P. Burt
• 2012-01-12: Checked n = 250000 - 290000, James P. Burt
• 2011-01-31: Checked n = 200000 - 250000, Steven Harvey
• 2010-12-29: Reserved by Steven Harvey to n = 250000
• 2010-11-01: Checked n = 6 - 4000, Steven Harvey, double-check
• 2008-11-30: Checked n = 100000 - 200000, Geoffrey Reynolds
• 2008-09-25: Reserved by Geoffrey Reynolds for n = 100000 - 200000
• 2007-01-06: Checked n = 60000 - 100000, Steven Harvey
• 2006-12-08: 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 = 6 - 5000, Mark Rodenkirch
• 2004-12-15: Reserved by Mark Rodenkirch to n = 6000
• 2004-12-03: Reserved by Mark Rodenkirch to n = 5000
• 2003-12-24: Found n = 51582, Steven Harvey
• 2000-04-04: Found n = 14838, Ray Ballinger
• 2000-01-23: Found n = 3812, Joe DeMaio