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%I #11 Apr 16 2023 04:15:54
%S 1,2,3,7,8,222,227,360,535,2713,9079
%N Numbers k such that 2^prime(k) - 1 + 10^k is prime.
%e 7 is there because the 7th prime is 17 and 2^17-1+10^7 is prime.
%t Position[PrimeQ[Table[(2^Prime[n] - 1) + 10^n, {n, 10}]], True]
%K nonn,more
%O 1,2
%A Joao Carlos Leandro da Silva (zxawyh66(AT)yahoo.com), Feb 02 2006
%E Edited by _Don Reble_, Jul 23 2006
%E a(10)-a(11) from _Michael S. Branicky_, Apr 15 2023
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