Generalized Cullen primes of the form n•25n+1

Current data

ASCII format : n*25^n+1 Base : 25 Count : 1 Max n : 2,809,620 Date : 2024-10-25

2805222

History

• 2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
• 2019-09: Checked n = 1000000 - 2809620, PrimeGrid Generalized Cullen Prime Search, released
• 2019-09-02: Found n = 2805222, Tom Greer, PrimeGrid Generalized Cullen Prime Search, (Official announcement)
• 2016-10-21: Reserved by PrimeGrid Generalized Cullen Prime Search
• ?: Checked n = 1 - 1000000, PrimeGrid Generalized Cullen Prime Search, double-check n = 1 - 315153, see PRPnet Maxn completed
• 2011: Checked n = 5595 - 315153, Günter Löh
• 2000: Checked n = 1 - 5595, Wilfrid Keller