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%I #21 Jul 04 2021 07:53:00
%S 229,241,673,5387,47581
%N Numbers k such that 23^k - 22^k is prime, or a strong pseudoprime.
%C Terms greater than 1000 often correspond to "unproven" strong pseudoprimes.
%C a(6) > 10^5. - _Robert Price_, Aug 22 2012
%Y Cf. A000043, A057468, A059801, A059802, A062572-A062588, A214658, A214655, A062592-A062666.
%K nonn,hard
%O 1,1
%A _Mike Oakes_, May 18 2001, May 19 2001
%E a(5) from _Robert Price_, Aug 22 2012
%E Edited by _M. F. Hasler_, Sep 21 2013
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