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
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<<valuation(n+1, 2)!=n+1} \\ M. F. Hasler, Feb 05 2014
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Apr 03 2008
EXTENSIONS
New name from Omar E. Pol, Jan 02 2014
STATUS
approved