Q: What is the prime factorization of the number 300,132,112?

 A:
  • The prime factors are: 2 x 2 x 2 x 2 x 7 x 103 x 26,017
    • or also written as { 2, 2, 2, 2, 7, 103, 26,017 }
  • Written in exponential form: 24 x 71 x 1031 x 26,0171

Why is the prime factorization of 300,132,112 written as 24 x 71 x 1031 x 26,0171?

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 300,132,112

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 300,132,112 by 2

300,132,112 ÷ 2 = 150,066,056 - No remainder! 2 is one of the factors!
150,066,056 ÷ 2 = 75,033,028 - No remainder! 2 is one of the factors!
75,033,028 ÷ 2 = 37,516,514 - No remainder! 2 is one of the factors!
37,516,514 ÷ 2 = 18,758,257 - No remainder! 2 is one of the factors!
18,758,257 ÷ 2 = 9,379,128.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
18,758,257 ÷ 3 = 6,252,752.3333 - This has a remainder. 3 is not a factor.
18,758,257 ÷ 5 = 3,751,651.4 - This has a remainder. 5 is not a factor.
18,758,257 ÷ 7 = 2,679,751 - No remainder! 7 is one of the factors!
2,679,751 ÷ 7 = 382,821.5714 - There is a remainder. We can't divide by 7 evenly anymore. Let's try the next prime number
2,679,751 ÷ 11 = 243,613.7273 - This has a remainder. 11 is not a factor.
2,679,751 ÷ 13 = 206,134.6923 - This has a remainder. 13 is not a factor.
2,679,751 ÷ 17 = 157,632.4118 - This has a remainder. 17 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
2,679,751 ÷ 103 = 26,017 - No remainder! 103 is one of the factors!
26,017 ÷ 103 = 252.5922 - There is a remainder. We can't divide by 103 evenly anymore. Let's try the next prime number
26,017 ÷ 107 = 243.1495 - This has a remainder. 107 is not a factor.
26,017 ÷ 109 = 238.6881 - This has a remainder. 109 is not a factor.
26,017 ÷ 113 = 230.2389 - This has a remainder. 113 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
26,017 ÷ 26,017 = 1 - No remainder! 26,017 is one of the factors!

The orange divisor(s) above are the prime factors of the number 300,132,112. If we put all of it together we have the factors 2 x 2 x 2 x 2 x 7 x 103 x 26,017 = 300,132,112. It can also be written in exponential form as 24 x 71 x 1031 x 26,0171.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 300,132,112.

300,132,112
Factor Arrows
2150,066,056
Factor Arrows
275,033,028
Factor Arrows
237,516,514
Factor Arrows
218,758,257
Factor Arrows
72,679,751
Factor Arrows
10326,017

More Prime Factorization Examples

300,132,110300,132,111300,132,113300,132,114
21 x 51 x 171 x 531 x 33,311131 x 311 x 1071 x 30,1611191 x 3171 x 49,831121 x 31 x 8391 x 59,6211

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