A more intuitive way of grasping what a prime number is involves trying to arrange a number of stones (or beans, or whatever) into a rectangular grid. That's the definition usually taught in schools. A prime number is a counting number which can't be divided, except by 1 or itself (every counting number can be divided by 1 and itself).
Is there a formula for finding prime numbers?.2 is the only even prime number – why is that?.How can you tell if a number is prime or not?.Frequently asked questions about prime numbers:
