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%I #11 Sep 08 2022 08:45:51
%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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