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A175173 Primes p such that 2^p+5 is also prime. 1

%I

%S 3,5,11,47,53,191,34763

%N Primes p such that 2^p+5 is also prime.

%C a(8) > 5*10^5. - _Robert Price_, Sep 18 2015

%F A000040 INTERSECT A059242. [_R. J. Mathar_, May 02 2010]

%e For p=3, 2^3+5=13; p=5, 2^5+5=37; p=11, 2^11+5=2053

%t Select[Prime@ Range@ 1000, PrimeQ[2^# + 5] &] (* _Michael De Vlieger_, Sep 18 2015 *)

%o (Magma) [p: p in PrimesUpTo(7000) | IsPrime(2^p+5) ]

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Mar 09 2010

%E a(7) from _Robert Price_, Sep 18 2015

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Last modified January 30 05:55 EST 2023. Contains 359939 sequences. (Running on oeis4.)