Definition: A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. “Is 29 a prime number” checks whether 29 fulfills this criterion.
Example: If we consider the number 12, it has the following divisors: 1, 2, 3, 4, 6, and 12. Since the divisors of 12 are greater than 1 and itself, it’s not a prime number.