In mathematics, a prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Numbers like 2, 3, 5, 7, and 11 are prime since they cannot be broken down into fewer positive integers. By contrast, numbers like 4, 6, 8, and 9 can be divided by other numbers (2, 2 +3, 2 × 4, 3 × 3).

  • *Is 111 a prime number traditional and primality tests?