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To identify whether a number is prime or composite, look at its factors. A Prime number has exactly two factors: one and itself. A composite number has more factors and can be written as the product of prime numbers.

For example:

Factors of 17: 1 and 17 so 17 is prime.

Factors of 102: 1, 2, 3, 6, 17, 34, 51 and 102 so 102 is composite. It can be expressed as the product of prime numbers by prime factoring: 2 x 3 x 17

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Q: How do you identify a number if its prime or composite number?
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