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A262934 Prime p such that 2^p + 27 is also prime. 1
2, 5, 13, 41, 89113 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 14 11:44 EDT 2019. Contains 327996 sequences. (Running on oeis4.)