Even though two is even, it's odd in that it's the only even prime: https://en.wikipedia.org/wiki/List_of_prime_numbers#Even_prime https://en.wikipedia.org/wiki

Even though two is even, it's odd in that it's the only even prime: https://en.wikipedia.org/wiki/List_of_prime_numbers#Even_prime https://en.wikipedia.org/wiki/List_of_prime_numbers#Even_pri... So all prime numbers are odd, even 2.