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Generalized Cullen primes of the form n•7n+1
Current data
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Remarks : |
The sequence A242177 in OEIS |
Notes
History
- 2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
- 2023-07-14: Checked n = 500000 - 2000000, Ryan Propper, released
- 2023-07-04: Reserved by Ryan Propper for n = 500000 - 2000000
- 2023-05-28: Checked n = 100000 - 500000, Mark Rodenkirch, double-check n = 100000 - 255681, released
- 2023-05-28: Found n = 474280, Mark Rodenkirch
- 2023-04-28: Reserved by Mark Rodenkirch to n = 500000
- 2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-check
- 2005: Checked n = 27927 - 255681, Günter Löh
- 2000: Checked n = 4415 - 27927, Wilfrid Keller
- 1998-11-13: Found n = 9898, Wilfrid Keller
- 1989: Checked n = 1 - 4415, Harvey Dubner
- 1989: Found n = 1980, Harvey Dubner
