OFFSET
1,2
LINKS
mersenneforum.org, Five or Bust - The Dual Sierpinski Problem
PROG
(PARI) a=1; forstep(n=1, 773, 2, k=1; while(!ispseudoprime(n+2^k), k++); if(k+1>a, print1(n, ", "); a=k+1));
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Arkadiusz Wesolowski, Oct 28 2015
STATUS
approved