A number that has only two factors is called a prime. The only factors of a prime are 1 and the number itself.
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Numbers with only one factor are called prime numbers. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. Examples of prime numbers include 2, 3, 5, 7, 11, and so on. These numbers have only two factors: 1 and the number itself.
No, every number has at a minimum two factors, which are itself and 1. If these are the only two factors, then the number is prime. If it has more factors, then the number is composite.
a composite number
prime number
A compound number has 3 or more factors, two of the factors being 1 and the number itself.