Prime numbers are positive integers with only two factors.
2, 3, 5 and 7 are examples of prime numbers.
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Numbers that have more than two factors are not prime numbers because prime numbers have only two factors.
All composite numbers are not prime numbers because they have more than two factors
Numbers with only two factors, the number itself and one, are called prime numbers. Examples of prime numbers are 2 (which is the only even prime number) and 17.
Some pairs of prime numbers are: 3, 5 11, 17 7, 23
2 and 3