Returns the product of all primes lower or equal to n
p = number_primorial ( n )
a 1x1 matrix of floating point integers, must be positive
a 1x1 matrix of floating point integers
The primorial function p(n) is p1*p2*...*pn, where pi are primes lower or equal than n.
number_primorial ( 2 ) // 2 number_primorial ( 3 ) // 2*3 number_primorial ( 4 ) // 2*3 number_primorial ( 7 ) // 2*3*5*7