HELP: Binom Function

The binomial coefficient function.
           BINOM(N,M) =  ---------
                         M! (N-M)!
In some cases BINOM(N,M) can be computed even though N! can not. For example, BINOM(N,M) is computed for 0 <= N <= 129 and 0 <= M <= N, while 37! is too large for the program to compute.
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