%I #17 Jul 04 2021 08:42:36
%S 5,17,67,73,691,9781,79201,89113
%N Numbers k such that 47^k - 46^k is prime.
%C Terms greater than 1000 are often only strong pseudoprimes.
%C a(9) > 10^5 - _Robert Price_, Oct 10 2012
%o (PARI) is(n)=ispseudoprime(47^n-46^n) \\ _Charles R Greathouse IV_, Jun 13 2017
%Y Cf. A000043, A057468, A059801, A059802, A062572-A062666.
%K nonn,hard
%O 1,1
%A _Mike Oakes_, May 18 2001, May 19 2001
%E a(7)-a(8) from _Robert Price_, Oct 10 2012 (computer run by Adam Marciniec)
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