%I
%S 9,255,1239,5895,221961
%N Difference between the smallest 10^nbit prime and 2^(10^n1).
%C a(5) found by _Serge Batalov_, Jun 11 2012.
%H Henri Lifchitz, Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/prptop.php">Probable Primes Top 10000.</a>
%e 2^99+255 is the smallest 100bit prime, 2^999+1239 is the smallest 1000bit prime, etc.
%o (PARI) a(n)=nextprime(2^(10^n1))2^(10^n1)
%Y Binary analog of A096548.
%K nonn,hard
%O 1,1
%A _Charles R Greathouse IV_, Jun 16 2012
