According to the Prime Time Algorithm, the 5th prime number is 11.
But don't just take our word for it! Check out the Prime Checkers to see the math for yourself.
Or, if you're feeling particularly prime-tastic, you can try the Prime Tasticness Test to see just how prime-tastic you can be.
Remember, the 5th prime number may be 11, but the 6th... well, that's a story for another time...