In factoring out the greatest common factor, we must first find the greatest common factor. So what we’re going to do is we’re going to write down each term of this expression.

Factors are numbers that divide exactly into a number. They are the multiplication “facts” of the number. A common factor is a factor that is shared by two or more numbers. The number 1 will ...

Prime numbers A prime number has exactly two factors, itself and one. The first ten prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29.