primefactors.logic

国外的一套开源CRM

member(X, [X | Rest]);
member(X, [Y | Rest]) :- member(X, Rest);
primes([2, 3, 5, 7, 11, 13]);
factor(X, P, Q) :- 
    primes(Primes), member(P, Primes),
    member(Q, Primes), =(P*Q, X);