Oh, no that's just the primes. I was responding to a person joking about how we don't even know all the primes, so I used a technical yet unhelpful definition of "the set of all primes" to be technically correct,xas is the mathematics way. :)

I don't know if prime factorization is the correct English word for it but the operation I am referring to takes a (non zero) natural number and returns a multiset of primes that give you the original number when multiplied together. Example: pf(12)={2,2,3} if we allowed 1 to be a prime then prime factorization cease to be a function as pf(12)={1,2,2,3} and pf(12)={1,1,1,1,2,2,3} become valid solutions.