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%I #12 Jul 12 2023 13:33:10
%S 9,15,21,44,58,64,96,108,138,160,222,534,2060,2446,3884,8794,9879,
%T 18303
%N Numbers k such that 6*10^k-11 is prime.
%C Some of the larger entries may only correspond to probable primes.
%C Numbers corresponding to terms <= 534 are certified primes. - _Klaus Brockhaus_, Feb 16 2005
%o (PARI) is(n)=ispseudoprime(6*10^n-11) \\ _Charles R Greathouse IV_, Jun 13 2017
%K nonn,more
%O 1,1
%A Tom Mueller (muel4503(AT)uni-trier.de), Feb 08 2005
%E a(12)-a(14) from _Klaus Brockhaus_, Feb 16 2005
%E a(15)-a(18) from _Michael S. Branicky_, Jul 12 2023
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