# Q: What is the prime factorization of the number 542,162?

A:
• The prime factors are: 2 x 307 x 883
• or also written as { 2, 307, 883 }
• Written in exponential form: 21 x 3071 x 8831

## Why is the prime factorization of 542,162 written as 21 x 3071 x 8831?

### 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 542,162

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 542,162 by 2

542,162 ÷ 2 = 271,081 - No remainder! 2 is one of the factors!
271,081 ÷ 2 = 135,540.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
271,081 ÷ 3 = 90,360.3333 - This has a remainder. 3 is not a factor.
271,081 ÷ 5 = 54,216.2 - This has a remainder. 5 is not a factor.
271,081 ÷ 7 = 38,725.8571 - This has a remainder. 7 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
271,081 ÷ 307 = 883 - No remainder! 307 is one of the factors!
883 ÷ 307 = 2.8762 - There is a remainder. We can't divide by 307 evenly anymore. Let's try the next prime number
883 ÷ 311 = 2.8392 - This has a remainder. 311 is not a factor.
883 ÷ 313 = 2.8211 - This has a remainder. 313 is not a factor.
883 ÷ 317 = 2.7855 - This has a remainder. 317 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
883 ÷ 883 = 1 - No remainder! 883 is one of the factors!

The orange divisor(s) above are the prime factors of the number 542,162. If we put all of it together we have the factors 2 x 307 x 883 = 542,162. It can also be written in exponential form as 21 x 3071 x 8831.

### Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 542,162.

 542,162 2 271,081 307 883

### More Prime Factorization Examples

 542,160 542,161 542,163 542,164 24 x 33 x 51 x 2511 371 x 14,6531 31 x 1271 x 1,4231 22 x 71 x 172 x 671

Try the factor calculator

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