Generalized Cullen primes of the form `n`•14ⁿ+1

Current data

3^[1], 5, 6, 9, 33, 45, 243, 252^[2], 1798, 2429, 5686, 12509, 42545, 1198433, 1486287, 1909683

Remarks :

The sequence A242197 in OEIS

2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
2023-05-29: Checked n = 1000000 - 2000000, Ryan Propper
2023-05-27: Found n = 1909683, Ryan Propper
2023-05-26: Found n = 1486287, Ryan Propper
2023-05-26: Found n = 1198433, Ryan Propper
2023-05-25: Reserved by Ryan Propper for n = 1000000 - 2000000
2023-05-20: Checked to n = 1000000, Ryan Propper
2023-05-18: Reserved by Ryan Propper to n = 1000000
2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-check
2012: Checked n = 4827 - 246922, Günter Löh
2000-12-06: Found n = 42545, Günter Löh
2000: Checked n = 2228 - 4827, Wilfrid Keller
2000-02: Found n = 2429, Wilfrid Keller
1998-11-30: Found n = 12509, Steffen Polster
1998-11-20: Found n = 5686, Steffen Polster
1989: Checked n = 1 - 2228, Harvey Dubner
1989: Found n = 1798, Harvey Dubner