First look what a prime number is? A prime number has exactly two distinct natural number divisors: 1 and itself.

An "even number" is an integer which is divisible by 2 with no remainder. The number "two" is divisible only by 2 and 1, and is therefore prime. All other even numbers are divisible by 2 but not by 1.

An "even number" is an integer which is divisible by 2 with no remainder. The number "two" is divisible only by 2 and 1, and is therefore prime. All other even numbers are divisible by 2 but not by 1.