

A262934


Prime p such that 2^p + 27 is also prime.


1




OFFSET

1,1


COMMENTS

a(6) > 376790.


LINKS

Table of n, a(n) for n=1..5.


FORMULA

A000040 INTERSECT A157007.


EXAMPLE

Prime 5 is in sequence because 2^5 + 27 = 59, which is also prime.


MATHEMATICA

Select[Prime[Range[100000]], PrimeQ[(2^# + 27)] &]


PROG

(PARI) forprime(p=2, 10^30, if (isprime(2^p + 3^3), print1(p", "))); \\ Altug Alkan, Oct 04 2015
(MAGMA) [p: p in PrimesUpTo(100)  IsPrime(2^p+27)]; // Vincenzo Librandi, Oct 05 2015


CROSSREFS

Cf. A157007.
Cf. similar sequences of the type "Primes p such that 2^p + k" listed in A262098.
Sequence in context: A179264 A096724 A088553 * A149869 A149870 A149871
Adjacent sequences: A262931 A262932 A262933 * A262935 A262936 A262937


KEYWORD

nonn,more


AUTHOR

Robert Price, Oct 04 2015


STATUS

approved



