one modulo
For a Wilson prime p, this function on p minus one is congruent to negative one modulo p. This function of z is given by the integral from zero to infinity dt of t to the z times e to the negative t. For large values of n, this operator on n can be approximated by Stirling's formula, and e can be written as the (*) infinite sum of the reciprocals of this function on whole numbers. It is extended to all complex numbers except the negative integers by the gamma function. This function on n represents the number of permutations of n items. For 10 points, name this operator equal to the product of all positive integers less than or equal to a given number, symbolized by an exclamation point.
For a Wilson prime p, this function on p minus one is congruent to negative
{factorial} [prompt on “{Gamma Function}”]