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%I #3 Oct 01 2013 17:58:00
%S 1000099,1000099999,1000099999999999999,
%T 1000099999999999999999999999999,1000099999999999999999999999999999,
%U 10000999999999999999999999999999999999999
%N Primes of the form 10^n + 10^(n-4) - 1.
%o (PARI) f(n,z) = for(x=z,n,y=10^x+10^(x-z)-1;if(ispseudoprime(y),print1(y",")))
%K nonn
%O 1,1
%A _Cino Hilliard_, Jul 28 2004
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