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%I #9 Aug 03 2014 14:01:36
%S 10,12,14,15,16,18,20,21,22,24,30,32,33,40,42,50,51,60,70,80,81,90,91,
%T 100,102,104,105,106,108,110,111,112,114,115,116,117,118,119,120,121,
%U 122,123,124,130,132,133,140,141,142,150,160,161,170,171,180,190
%N Nonprime numbers whose multiplicative persistence is 1.
%C Complement of A046501 with respect to A046510.
%e 105 -> 1 * 0 * 5 = 0; one digit in one step.
%t persistence[n_] := Module[{cnt = 0, k = n}, While[k > 9, cnt++; k = Times @@ IntegerDigits[k]]; cnt]; Select[Range[200], ! PrimeQ[#] && persistence[#] == 1 &] (* _T. D. Noe_, Nov 23 2011 *)
%Y Cf. A046501 (primes whose multiplicative persistence is 1).
%K nonn,base
%O 1,1
%A _Jaroslav Krizek_, Nov 13 2011
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