I've always thought of 1 as the definition of what a prime number is. Therefore, because it's generally bad practice to define a thing in terms of itself, 1 sho

I've always thought of 1 as the definition of what a prime number is. Therefore, because it's generally bad practice to define a thing in terms of itself, 1 shouldn't be categorized as a prime number. Instead, it's like the Aristotilian Ideal of prime made linear.