functions in gcd.i - f

    factorize(x)  


return list of prime factors of X and their powers as an n-by-2  
array.  May include a large non-prime factor if X exceeds 3e9.  
In any event, product(result(,1)^result(,2)) will equal abs(X).  
X must be a scalar integer type.  
Interpreted function, defined at i/gcd.i   line 83