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A177465 Primes of the form (35*10^n-71)/9 0
31, 3881, 38888888888888888881, 3888888888888888888888888888881, 38888888888888888888888888888888888888881, 3888888888888888888888888888888888888888881, 3888888888888888888888888888888888888888888881 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[10 FromDigits[PadRight[{3}, n, 8]]+1, {n, 50}], PrimeQ] (* Harvey P. Dale, Jul 02 2021 *)
PROG
(Magma) [a: n in [0..250]|IsPrime(a) where a is (35*10^n-71)div(9)]
CROSSREFS
Sequence in context: A072913 A001237 A289397 * A187755 A351133 A350721
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Dec 11 2010
STATUS
approved

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Last modified June 14 15:00 EDT 2024. Contains 373400 sequences. (Running on oeis4.)