Search: id:A109503
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%I A109503
%S A109503 0,1,4,5,11,30,60,64,869,1685,12109
%N A109503 Numbers n such that 66 * 10^n + 1 is prime.
%C A109503 All terms proved prime. Proof for the largest: PFGW Version 1.2.0 for 
               Windows [FFT v23.8] Primality testing 66*10^12109+1 [N-1, Brillhart-Lehmer-Selfridge] 
               Running N-1 test using base 7 Calling Brillhart-Lehmer-Selfridge 
               with factored part 69.89% 66*10^12109+1 is prime! (27.9892s+0.0059s). 
               No more terms up to 38800, although another is 65460 found by Peter 
               Benson (listed at Caldwell's Top-5000 Primes site).
%Y A109503 Sequence in context: A000769 A050831 A056799 this_sequence A067371 A068719 
               A034773
%Y A109503 Adjacent sequences: A109500 A109501 A109502 this_sequence A109504 A109505 
               A109506
%K A109503 nonn
%O A109503 1,3
%A A109503 Jason Earls (zevi_35711(AT)yahoo.com), Aug 29 2005

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