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 A273811 Primes of the form 2^(2^n) + 805. 1
 809, 821, 1061, 4294968101, 18446744073709552421 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Terms given correspond to n = 1, 2, 3, 5 and 6. Next term >= 2^2^25 + 805. - Charles R Greathouse IV, Jun 07 2016 LINKS Table of n, a(n) for n=1..5. MATHEMATICA Select[Table[2^(2^n) + 805, {n, 0, 15}], PrimeQ] PROG (Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+805]; (PARI) for(n=1, 6, if(ispseudoprime(t=2^2^n+805), print1(t", "))) \\ Charles R Greathouse IV, Jun 07 2016 CROSSREFS Cf. similar sequences listed in A273547. Sequence in context: A259959 A332180 A160034 * A252028 A031599 A265984 Adjacent sequences: A273808 A273809 A273810 * A273812 A273813 A273814 KEYWORD nonn AUTHOR Vincenzo Librandi, Jun 03 2016 STATUS approved

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Last modified September 16 22:04 EDT 2024. Contains 375979 sequences. (Running on oeis4.)