Which of the following best states the Fundamental Theorem of Arithmetic?
a) Every integer greater than 1 has at least one prime factor.
b) Every integer greater than 1 can be expressed as a product of prime numbers in exactly one way, apart from the order of the factors.
c) Every integer greater than 1 can be expressed as a sum of prime numbers in exactly one way.
d) Every integer greater than 1 can be expressed as a product of prime numbers, but this factorisation may not be unique.