This theorem, discovered by the great Pierre Fermat, states that every even number is the sum of two prime numbers.
But what does it really mean?
Well, imagine you're at a party with all your number theory friends. You're all having a blast, dancing the prime numbers, sipping on some even number cocktails. But then, suddenly, someone asks you to leave.
Why? Because you're not prime, that's why! But don't worry, you can always find another prime number to party with.
But what about the party host, 2? Who's the prime number that's always invited to every party?
Why, it's 3 of course! The life of the party, always prime and always invited.
Why was 2 kicked out of the party?Because it was even!