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 A188677 Primes p such that the minimum value of |p-2^x|, x>0, is also a prime. 1
 11, 13, 19, 23, 29, 37, 43, 53, 59, 61, 67, 71, 83, 97, 109, 131, 139, 151, 157, 181, 197, 227, 233, 239, 251, 263, 269, 293, 317, 353, 359, 383, 409, 433, 439, 499, 509, 523, 541, 571, 601, 613, 619, 643, 661, 691, 709, 739, 751, 773, 797, 827, 857 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Originally submitted by Benoit Cloitre, Dec 17 2002 as A078686 and corrected by Robert G. Wilson v, Apr 08 2011. LINKS FORMULA Intersection of A086081 and A091932. - Robert G. Wilson v, May 27 2011 MATHEMATICA fQ[n_] := Block[{x = Floor@ Log2@ n}, PrimeQ@ Min[n - 2^x, 2^(x+1) - n]]; Select[ Prime@ Range@ 150, fQ] (* Robert G. Wilson v, Apr 08 2011 *) PROG (PARI) is(n)=if(isprime(n), my(x=log(n)\log(2)); isprime(min(abs(n-1<

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Last modified August 4 14:04 EDT 2020. Contains 336201 sequences. (Running on oeis4.)