Q: What is the prime factorization of the number 333,111,016?

 A:
  • The prime factors are: 2 x 2 x 2 x 7 x 7 x 849,773
    • or also written as { 2, 2, 2, 7, 7, 849,773 }
  • Written in exponential form: 23 x 72 x 849,7731

Why is the prime factorization of 333,111,016 written as 23 x 72 x 849,7731?

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 333,111,016

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 333,111,016 by 2

333,111,016 ÷ 2 = 166,555,508 - No remainder! 2 is one of the factors!
166,555,508 ÷ 2 = 83,277,754 - No remainder! 2 is one of the factors!
83,277,754 ÷ 2 = 41,638,877 - No remainder! 2 is one of the factors!
41,638,877 ÷ 2 = 20,819,438.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
41,638,877 ÷ 3 = 13,879,625.6667 - This has a remainder. 3 is not a factor.
41,638,877 ÷ 5 = 8,327,775.4 - This has a remainder. 5 is not a factor.
41,638,877 ÷ 7 = 5,948,411 - No remainder! 7 is one of the factors!
5,948,411 ÷ 7 = 849,773 - No remainder! 7 is one of the factors!
849,773 ÷ 7 = 121,396.1429 - There is a remainder. We can't divide by 7 evenly anymore. Let's try the next prime number
849,773 ÷ 11 = 77,252.0909 - This has a remainder. 11 is not a factor.
849,773 ÷ 13 = 65,367.1538 - This has a remainder. 13 is not a factor.
849,773 ÷ 17 = 49,986.6471 - This has a remainder. 17 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
849,773 ÷ 849,773 = 1 - No remainder! 849,773 is one of the factors!

The orange divisor(s) above are the prime factors of the number 333,111,016. If we put all of it together we have the factors 2 x 2 x 2 x 7 x 7 x 849,773 = 333,111,016. It can also be written in exponential form as 23 x 72 x 849,7731.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 333,111,016.

333,111,016
Factor Arrows
2166,555,508
Factor Arrows
283,277,754
Factor Arrows
241,638,877
Factor Arrows
75,948,411
Factor Arrows
7849,773

More Prime Factorization Examples

333,111,014333,111,015333,111,017333,111,018
21 x 166,555,507133 x 51 x 2,467,48911,9311 x 172,507121 x 31 x 5,8571 x 9,4791

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