Q: What is the prime factorization of the number 509,221?

 A:
  • The prime factors are: 509,221
    • or also written as { 509,221 }
  • Written in exponential form: 509,2211

Why is the prime factorization of 509,221 written as 509,2211?

What is prime factorization?

Prime factorization or prime factor decomposition is the process of finding which prime numbers can be multiplied together to make the original number.

Finding the prime factors of 509,221

To find the prime factors, you start by dividing the number by the first prime number, which is 2. If there is not a remainder, meaning you can divide evenly, then 2 is a factor of the number. Continue dividing by 2 until you cannot divide evenly anymore. Write down how many 2's you were able to divide by evenly. Now try dividing by the next prime factor, which is 3. The goal is to get to a quotient of 1.

If it doesn't make sense yet, let's try it...

Here are the first several prime factors: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29...

Let's start by dividing 509,221 by 2

509,221 ÷ 2 = 254,610.5 - This has a remainder. Let's try another prime number.
509,221 ÷ 3 = 169,740.3333 - This has a remainder. Let's try another prime number.
509,221 ÷ 5 = 101,844.2 - This has a remainder. Let's try another prime number.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
509,221 ÷ 509,221 = 1 - No remainder! 509,221 is one of the factors!

The orange divisor(s) above are the prime factors of the number 509,221. If we put all of it together we have the factors 509,221 = 509,221. It can also be written in exponential form as 509,2211.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 509,221.

More Prime Factorization Examples

509,219509,220509,222509,223
191 x 26,801122 x 33 x 51 x 231 x 41121 x 71 x 36,373131 x 111 x 131 x 1,1871

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