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A104067 Primes of the form 2^k + 13. 6

%I #13 Sep 08 2022 08:45:17

%S 17,29,269,1048589,274877906957,18446744073709551629,

%T 1208925819614629174706189,

%U 7957171782556586274486115970349133441607298412757563479047423630290551952200534008528909

%N Primes of the form 2^k + 13.

%F a(n) = 2^A102634(n) + 13. - _R. J. Mathar_, Feb 22 2009

%t a = Delete[Union[Flatten[Table[If [PrimeQ[2^n + 13] == True, 2^n + 13, 0], {n, 1, 400}]]], 1]

%o (Magma) [ a: n in [0..350] | IsPrime(a) where a is 2^n+13 ] // _Vincenzo Librandi_, Nov 16 2010

%K nonn

%O 1,1

%A _Roger L. Bagula_, Mar 02 2005

%E Definition corrected by Edwin Dyke (ed.dyke(AT)btinternet.com), Feb 19 2009

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Last modified February 21 14:25 EST 2024. Contains 370235 sequences. (Running on oeis4.)