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 A138837 Non-Mersenne primes: A000040 \ A000668. 12
 2, 5, 11, 13, 17, 19, 23, 29, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes that are not Mersenne primes A000668. Pandigital primes in base 2. (Pandigital interpreted as including all digits, not necessarily only once each.) - Franklin T. Adams-Watters, May 11 2011 Primes whose sum of divisors is not a power of 2. - Omar E. Pol, Dec 19 2016 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 Microsoft Ltd., The Prime Challenge, Dec. 2013 OEIS wiki, Pandigital primes. FORMULA A138837 = A000040 \ A000668. - M. F. Hasler, Feb 09 2014 MATHEMATICA max = 300; Complement[Prime[Range[PrimePi[max]]], 2^Range[Ceiling[Log[2, max]]] - 1] (* Alonso del Arte, Dec 30 2013 *) PROG (PARI) is_A138837(n)={isprime(n)&&1<

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Last modified July 21 04:40 EDT 2019. Contains 325189 sequences. (Running on oeis4.)