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A270860 Least Quasi-Carmichael number with n prime factors. 0

%I #11 Apr 27 2017 12:01:13

%S 35,165,6545,179998,7509579,850253030

%N Least Quasi-Carmichael number with n prime factors.

%e 6545 = 5*7*11*17 and 12, 14, 18, 24 all divide 6552.

%o (Perl) use ntheory ":all"; my $f=2; forcomposites { say $f++," $_" if scalar(factor($_))==$f && is_quasi_carmichael($_); } 1e9; # _Dana Jacobsen_, Apr 27 2017

%Y Cf. A257750 (Quasi-Carmichael numbers).

%K nonn,more,hard

%O 2,1

%A _Tim Johannes Ohrtmann_, Mar 24 2016

%E a(7) from _Dana Jacobsen_, Apr 04 2016

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Last modified September 17 16:56 EDT 2024. Contains 375990 sequences. (Running on oeis4.)