Generalized Cullen primes of the form n•9n+1

Current data

ASCII format : n*9^n+1 Base : 9 Count : 5 Max n : 500,000 Date : 2023-05-28

2, 12382, 27608, 31330, 117852

Remarks :

The sequence A265013 in OEIS See additional history at Generalized Cullen primes & Discoverers of Generalized Cullen primes.

History

• 2023-05-28: Checked n = 100000 - 500000, Mark Rodenkirch, double-check n = 100000 - 222431, released
• 2023-04-28: Reserved by Mark Rodenkirch to n = 500000
• 2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-check
• 2010: Checked n = 8021 - 222431, Günter Löh
• 2002-01-28: Found n = 117852, Günter Löh
• 2000-02-03: Found n = 31330, Günter Löh
• 2000-01-31: Found n = 27608, Günter Löh
• 2000-01-26: Found n = 12382, Günter Löh
• 2000: Checked n = 4895 - 8021, Wilfrid Keller
• 1989: Checked n = 1 - 4895, Harvey Dubner