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 A108271 Consider primes p and q such that p = 2^k + 15 and q = 2^(k+1) + 15 for some k; sequence gives values of q. 1

%I

%S 19,23,31,47,79,2063,4111,65551,8388623

%N Consider primes p and q such that p = 2^k + 15 and q = 2^(k+1) + 15 for some k; sequence gives values of q.

%o (PARI) g(m,n,b) = { for(x=0,n, y=m+b^x+b%2; z=m+b^(x+1)+b%2; if(isprime(y)&isprime(z),print1(y",") ) ) }

%o (MAGMA) for k in [0..100] do p:=2^k+15; q:=2^(k+1)+15; if IsPrime(p) and IsPrime(q) then q; end if; end for;

%Y Cf. A108266.

%K nonn

%O 1,1

%A _Cino Hilliard_, Jun 29 2005

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Last modified June 13 11:07 EDT 2021. Contains 344989 sequences. (Running on oeis4.)