Generalized Cullen primes of the form n•27n+1

Current data

ASCII format : n*27^n+1 Base : 27 Count : 6 Max n : 215,413 Date : 2024-10-25

2, 56, 23454, 259738, 312498, 437960

History

• 2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
• 2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-check
• 2012-11-24: Found n = 437960, Thomas Ritschel
• 2012-02-01: Found n = 312498, Thomas Ritschel
• 2011-12-20: Found n = 259738, Thomas Ritschel
• 2010: Checked n = 3481 - 215413, Günter Löh
• 2000-08-12: Checked to n = 23454, Günter Löh
• 2000: Checked n = 1 - 3481, Wilfrid Keller