system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why are Prime Numbers special?

A Prime number is any number only divisible by itself and 1. Why are so many mathematical problems related to this? What is special about Prime Numbers?
gpt
They are important because any number is either a prime or can be represented as a product of primes. As such, they become the building blocks for the other numbers.

There was a fundamental theorem of something based on that (sorry, it has been many years)