Uh... Whut?
“A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. “
“The fundamental theorem of arithmetic establishes the central role of primes in number theory: any integer greater than 1 can be expressed as a product of primes that is unique up to ordering. The uniqueness in this theorem requires excluding 1 as a prime because one can include arbitrarily many instances of 1 in any factorization, e.g., 3, 1 × 3, 1 × 1 × 3, etc. are all valid factorizations of 3.”
http://en.wikipedia.org/wiki/Prime_number#Definition_and_examples