The number 1 is not a prime number or a composite number. It is often referred to as a unit. The only even prime number is 2. All other even numbers can be divided by 2 Knowledge of prime numbers ...

A prime number is a whole number, greater than 1, that only has two factors. A factor is a number that divides another number evenly, with no remainder or decimal. The factors of a prime number are ...

A prime number is an integer, or whole number, that has only two factors — 1 and itself. Put another way, a prime number can be divided evenly only by 1 and by itself. Prime numbers also must be ...