Q: What is the prime factorization of the number 150,543,328?

 A:
  • The prime factors are: 2 x 2 x 2 x 2 x 2 x 13 x 101 x 3,583
    • or also written as { 2, 2, 2, 2, 2, 13, 101, 3,583 }
  • Written in exponential form: 25 x 131 x 1011 x 3,5831

Why is the prime factorization of 150,543,328 written as 25 x 131 x 1011 x 3,5831?

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 150,543,328

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 150,543,328 by 2

150,543,328 ÷ 2 = 75,271,664 - No remainder! 2 is one of the factors!
75,271,664 ÷ 2 = 37,635,832 - No remainder! 2 is one of the factors!
37,635,832 ÷ 2 = 18,817,916 - No remainder! 2 is one of the factors!
18,817,916 ÷ 2 = 9,408,958 - No remainder! 2 is one of the factors!
9,408,958 ÷ 2 = 4,704,479 - No remainder! 2 is one of the factors!
4,704,479 ÷ 2 = 2,352,239.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
4,704,479 ÷ 3 = 1,568,159.6667 - This has a remainder. 3 is not a factor.
4,704,479 ÷ 5 = 940,895.8 - This has a remainder. 5 is not a factor.
4,704,479 ÷ 7 = 672,068.4286 - This has a remainder. 7 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
4,704,479 ÷ 13 = 361,883 - No remainder! 13 is one of the factors!
361,883 ÷ 13 = 27,837.1538 - There is a remainder. We can't divide by 13 evenly anymore. Let's try the next prime number
361,883 ÷ 17 = 21,287.2353 - This has a remainder. 17 is not a factor.
361,883 ÷ 19 = 19,046.4737 - This has a remainder. 19 is not a factor.
361,883 ÷ 23 = 15,734.0435 - This has a remainder. 23 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
361,883 ÷ 101 = 3,583 - No remainder! 101 is one of the factors!
3,583 ÷ 101 = 35.4752 - There is a remainder. We can't divide by 101 evenly anymore. Let's try the next prime number
3,583 ÷ 103 = 34.7864 - This has a remainder. 103 is not a factor.
3,583 ÷ 107 = 33.486 - This has a remainder. 107 is not a factor.
3,583 ÷ 109 = 32.8716 - This has a remainder. 109 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
3,583 ÷ 3,583 = 1 - No remainder! 3,583 is one of the factors!

The orange divisor(s) above are the prime factors of the number 150,543,328. If we put all of it together we have the factors 2 x 2 x 2 x 2 x 2 x 13 x 101 x 3,583 = 150,543,328. It can also be written in exponential form as 25 x 131 x 1011 x 3,5831.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 150,543,328.

150,543,328
Factor Arrows
275,271,664
Factor Arrows
237,635,832
Factor Arrows
218,817,916
Factor Arrows
29,408,958
Factor Arrows
24,704,479
Factor Arrows
13361,883
Factor Arrows
1013,583

More Prime Factorization Examples

150,543,326150,543,327150,543,329150,543,330
21 x 231 x 3,272,681131 x 111 x 191 x 240,10111071 x 1,406,947121 x 31 x 51 x 71 x 171 x 42,1691

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