# How do you get the methods of prime factors?

All composite numbers can be expressed as unique products of
prime numbers. This is accomplished by dividing the original number
and its factors by prime numbers until all the factors are prime. A
factor tree can help you visualize this.

Example: 210

210 Divide by two.

105,2 Divide by three.

35,3,2 Divide by five.

7,5,3,2 Stop. All the factors are prime.

2 x 3 x 5 x 7 = 210

That's the prime factorization of 210.