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A138647 Primes of form (5^n+1)/6. 1
521, 11293772630057337854244300009061892827351888021, 6573840876841765045097738044023218580610053625908525039752324422200521, 164346021921044126127443451100580464515251340647713125993808110555013021 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
a={}; Do[x=(5^n+1)/6; If[PrimeQ[x], AppendTo[a, x]], {n, 0, 12^2}]; a
Select[(5^Range[0, 200]+1)/6, PrimeQ] (* Harvey P. Dale, Jul 18 2011 *)
CROSSREFS
Sequence in context: A028484 A057699 A033525 * A045050 A305268 A004968
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified July 13 18:16 EDT 2024. Contains 374285 sequences. (Running on oeis4.)