Five is one example.
The positive integer with only one factor is 1.
2 is the smallest prime factor of 12.
Five
If a number is not prime- that is, if a number has a positive factor besides one and itself- it is a composite number.
The least common factor of any set of positive integers is 1, and 1 does not have a prime factorization.
A prime number has two positive integer factors, itself and 1. The number 0 has no positive integer factors, and is therefore not prime. The number 1 has just a single positive integer factor, and once again, is not prime.
The definition of a prime is an integer that has two positive factors, one and itself. These are two distinct factors. One only has one positive factor. Thus it's not a prime.
47 - 2 = 45
A factor is a number or algebraic expression by which another is exactly divisible. A prime number is a positive integer with two factors: one and the number itself.
A multiple of 13 will be a composite number. Because the number will have 13 as a factor, it cannot be a prime number.
The least common factor of any set of positive integers is 1. The least common multiple of relatively prime numbers is their product.
There isn't one. Negative numbers have prime factors and numbers don't stop. The smallest positive numbers with a prime factor is 2.