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 A258933 Numbers n such that 10^n + 109 is prime. 1
 3, 5, 41, 357, 395, 479, 645, 2637, 8853, 11529, 20087, 27443, 30635 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE For n = 3, a(3) = 10^3 + 109 = 1109, which is prime. MATHEMATICA Select[Range[3000], PrimeQ[10^# + 109] &] PROG (MAGMA) [n: n in [1..400] | IsPrime(10^n+109)]; (PARI) is(n)=ispseudoprime(10^n+109) \\ Charles R Greathouse IV, Jun 13 2017 CROSSREFS Cf. similar sequences listed in A258932. Sequence in context: A096058 A120265 A158328 * A060433 A216085 A219018 Adjacent sequences:  A258930 A258931 A258932 * A258934 A258935 A258936 KEYWORD nonn,more AUTHOR Vincenzo Librandi, Jun 15 2015 EXTENSIONS a(9)-a(13) from Jens Kruse Andersen, Jun 23 2015 STATUS approved

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Last modified September 19 18:06 EDT 2020. Contains 337181 sequences. (Running on oeis4.)