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Generalized Cullen primes of the form `n`•5ⁿ+1

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Current data

ASCII format :	n*5^n+1
Base :	5
Count :	2
Max `n` :	2,000,000
Date :	2023-07-14

1242, 18390^[1]

Notes

↑ Proth 3678•5¹⁸³⁹¹+1

History

2023-07-14: Checked to n = 2000000, Ryan Propper
2023-05-28: Checked to n = 500000, Mark Rodenkirch
2023-04-28: Reserved by Mark Rodenkirch to n=500000
2023-04-23: Checked n = 2 - 100000, Mark Rodenkirch, double-checked
1998-11-15: Found n = 18390, Wilfrid Keller

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Cullen prime