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%I #18 Apr 22 2024 08:12:06
%S 294409,167979421,1152091655881,62411762908817281,1516087654274358001
%N Least imprimitive Carmichael number (A328935) with n prime factors, or -1 if no such number exists.
%C From _Daniel Suteu_, Feb 17 2020: (Start)
%C a(8) <= 42310088783100741554666880481,
%C a(9) <= 21593590390253023722267234622513201,
%C a(10) <= 16412975107923138847512341751620644377601,
%C a(11) <= 325533792014488126487416882038879701391121. (End)
%C a(8) > 10^22. - _Amiram Eldar_, Apr 22 2024
%H Andrew Granville and Carl Pomerance, <a href="https://doi.org/10.1090/S0025-5718-01-01355-2">Two contradictory conjectures concerning Carmichael numbers</a>, Mathematics of Computation, Vol. 71, No. 238 (2002), pp. 883-908.
%H <a href="/index/Ca#Carmichael">Index entries for sequences related to Carmichael numbers</a>.
%Y Cf. A002997, A006931, A328935.
%K nonn,more
%O 3,1
%A _Amiram Eldar_, Oct 31 2019
%E Escape clause added by _Amiram Eldar_, Apr 22 2024
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