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Carmichael numbers equal to the product of 6 primes.
9

%I #6 Apr 14 2015 22:54:47

%S 321197185,413631505,417241045,496050841,509033161,611397865,

%T 612347905,638959321,672389641,832060801,834720601,868234081,

%U 945959365,986088961,1074363265,1177800481,1210178305,1256855041,1410833281,1481619601

%N Carmichael numbers equal to the product of 6 primes.

%H R. J. Mathar, <a href="/A112429/b112429.txt">Table of n, a(n) for n = 1..14401</a>

%e a(1)=321197185=5*19*23*29*37*137

%o (PARI) is(n)={omega(n)==6&&is_A002997(n)} \\ _M. F. Hasler_, Apr 14 2015

%Y Cf. A002997, A087788, A141711, A074379, A112428, A112430, A112431, A112432, A006931.

%K easy,nonn

%O 1,1

%A _Shyam Sunder Gupta_, Dec 11 2005