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%I #3 Oct 01 2013 17:58:09
%S 7,61,509,4093,32749,262139,2097143,16777213,134217689,1073741789,
%T 8589934583,68719476731,549755813881,4398046511093,35184372088777,
%U 281474976710597,2251799813685119,18014398509481951,144115188075855859
%N Largest prime <= 8^n.
%o (PARI) g(n,b) = for(x=0,n,print1(precprime(b^x)","))
%K easy,nonn
%O 1,1
%A _Cino Hilliard_, Mar 03 2005