Q: What is the prime factorization of the number 630,851,248?

 A:
  • The prime factors are: 2 x 2 x 2 x 2 x 587 x 67,169
    • or also written as { 2, 2, 2, 2, 587, 67,169 }
  • Written in exponential form: 24 x 5871 x 67,1691

Why is the prime factorization of 630,851,248 written as 24 x 5871 x 67,1691?

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 630,851,248

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 630,851,248 by 2

630,851,248 ÷ 2 = 315,425,624 - No remainder! 2 is one of the factors!
315,425,624 ÷ 2 = 157,712,812 - No remainder! 2 is one of the factors!
157,712,812 ÷ 2 = 78,856,406 - No remainder! 2 is one of the factors!
78,856,406 ÷ 2 = 39,428,203 - No remainder! 2 is one of the factors!
39,428,203 ÷ 2 = 19,714,101.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
39,428,203 ÷ 3 = 13,142,734.3333 - This has a remainder. 3 is not a factor.
39,428,203 ÷ 5 = 7,885,640.6 - This has a remainder. 5 is not a factor.
39,428,203 ÷ 7 = 5,632,600.4286 - This has a remainder. 7 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
39,428,203 ÷ 587 = 67,169 - No remainder! 587 is one of the factors!
67,169 ÷ 587 = 114.4276 - There is a remainder. We can't divide by 587 evenly anymore. Let's try the next prime number
67,169 ÷ 593 = 113.2698 - This has a remainder. 593 is not a factor.
67,169 ÷ 599 = 112.1352 - This has a remainder. 599 is not a factor.
67,169 ÷ 601 = 111.7621 - This has a remainder. 601 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
67,169 ÷ 67,169 = 1 - No remainder! 67,169 is one of the factors!

The orange divisor(s) above are the prime factors of the number 630,851,248. If we put all of it together we have the factors 2 x 2 x 2 x 2 x 587 x 67,169 = 630,851,248. It can also be written in exponential form as 24 x 5871 x 67,1691.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 630,851,248.

630,851,248
Factor Arrows
2315,425,624
Factor Arrows
2157,712,812
Factor Arrows
278,856,406
Factor Arrows
239,428,203
Factor Arrows
58767,169

More Prime Factorization Examples

630,851,246630,851,247630,851,249630,851,250
21 x 591 x 1811 x 29,537134 x 131 x 1731 x 3,463171 x 171 x 471 x 1491 x 757121 x 31 x 54 x 168,2271

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