The concept of prime number and composite number

The concept of prime number and composite number

Prime number is also called prime number. It refers to the number in a natural number greater than 1 which can not be divided by other natural numbers except 1 and the integer itself. In other words, a natural number with only two positive factors (1 and itself) is a prime number
Composite number refers to the natural number in addition to 1 and itself divisible, but also divisible by other numbers