Prime numbers are whole numbers that have only two factors: 1 and the number itself. The first few prime numbers are 2, 3, 5, 7. For instance, 6 has four factors: 1, 2, 3, 6. 1 X 6 = 6 2 X 3 = 6 So we ...

A number is a prime number. If that number is only divisible by 1 and the number itself. This means a prime number is not divisible by any numbers between 1 and the number itself. So, to check prime, ...