A205771 Primes of the form 2*5^n+1.
3, 11, 251, 2441406251, 56843418860808014869689941406251, 49303806576313237838233035330174139354575402194313937798142433166503906251
Offset: 1
Keywords
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..9
Crossrefs
Cf. A058934
Programs
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Mathematica
Select[2*5^Range[0, 500] + 1, PrimeQ]