Two Is the Only Even Prime Number.
All other prime numbers are odd because if they were even, they would be divisible by two and thus not prime. This makes two unique in number theory.

1 fact
Discover the fascinating world of prime numbers! These unique integers, only divisible by 1 and themselves, are fundamental to mathematics and cryptography.
All other prime numbers are odd because if they were even, they would be divisible by two and thus not prime. This makes two unique in number theory.