primorial

प्राइमोरियल; गणित में एक एकल-संकार्य जो किसी संख्या तक के सभी अभाज्य संख्याओं का गुणनफल देता है

A unary operation, denoted by the postfix symbol # and defined on the nonnegative integers, which maps 0 to 1, 1 to 1, and each subsequent number to the product of all primes less than or equal to it; the value mapped to by said operation for a given input.