The only even prime number is 2.

This is because a prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. All even numbers greater than 2 are divisible by 2, meaning they are not prime. Therefore, 2 is the only even number that fits the definition of a prime number.

Let me know if you need further explanation or have any other questions!

Here are some related questions:

1. What is the definition of a prime number?
2. Why is 1 not considered a prime number?
3. Can a prime number be negative?
4. How do you determine if a large number is prime?
5. What are some properties of prime numbers?

Tip: To test if a number is prime, check if it has any divisors other than 1 and itself by dividing it by all numbers up to its square root.