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A205771 Primes of the form 2*5^n+1. 3
3, 11, 251, 2441406251, 56843418860808014869689941406251, 49303806576313237838233035330174139354575402194313937798142433166503906251 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..9

MATHEMATICA

Select[2*5^Range[0, 500] + 1, PrimeQ]

CROSSREFS

Cf. A058934

Sequence in context: A165946 A253639 A112357 * A097423 A111130 A337415

Adjacent sequences:  A205768 A205769 A205770 * A205772 A205773 A205774

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jan 31 2012

STATUS

approved

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Last modified September 20 03:44 EDT 2020. Contains 337264 sequences. (Running on oeis4.)