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%I #23 Jul 04 2021 09:13:53
%S 2,709
%N Numbers k such that 99^k - 98^k is prime.
%C a(3) > 20000. - _Derek Orr_, Sep 03 2014
%C Terms must be prime. - _Derek Orr_, Sep 03 2014
%C a(3) > 10^5. - _Robert Price_, Mar 22 2015
%o (PARI) is(n)=ispseudoprime(99^n-98^n) \\ _Charles R Greathouse IV_, Sep 04 2014
%Y Cf. A000043, A057468, A059801, A059802, A062572-A062666.
%K nonn,hard,bref
%O 1,1
%A _Mike Oakes_, May 18 2001, May 19 2001