A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
A composite number has three or more factors.
A composite factor is a factor that is a composite number, as opposed to a prime factor which is a factor that is a prime number.
All natural numbers (counting numbers) greater than one are either prime or composite. If divisible by only one and the number itself, it is prime; if divisible by other natural numbers, then is composite. One is the only natural number that is neither prime nor composite.
139 is a prime number. Prime numbers have only one prime factor: the numbers themselves.
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