Q: What is the prime factorization of the number 250,410,519?

 A:
  • The prime factors are: 3 x 3 x 19 x 701 x 2,089
    • or also written as { 3, 3, 19, 701, 2,089 }
  • Written in exponential form: 32 x 191 x 7011 x 2,0891

Why is the prime factorization of 250,410,519 written as 32 x 191 x 7011 x 2,0891?

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 250,410,519

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 250,410,519 by 2

250,410,519 ÷ 2 = 125,205,259.5 - This has a remainder. Let's try another prime number.
250,410,519 ÷ 3 = 83,470,173 - No remainder! 3 is one of the factors!
83,470,173 ÷ 3 = 27,823,391 - No remainder! 3 is one of the factors!
27,823,391 ÷ 3 = 9,274,463.6667 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
27,823,391 ÷ 5 = 5,564,678.2 - This has a remainder. 5 is not a factor.
27,823,391 ÷ 7 = 3,974,770.1429 - This has a remainder. 7 is not a factor.
27,823,391 ÷ 11 = 2,529,399.1818 - This has a remainder. 11 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
27,823,391 ÷ 19 = 1,464,389 - No remainder! 19 is one of the factors!
1,464,389 ÷ 19 = 77,073.1053 - There is a remainder. We can't divide by 19 evenly anymore. Let's try the next prime number
1,464,389 ÷ 23 = 63,669.087 - This has a remainder. 23 is not a factor.
1,464,389 ÷ 29 = 50,496.1724 - This has a remainder. 29 is not a factor.
1,464,389 ÷ 31 = 47,238.3548 - This has a remainder. 31 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
1,464,389 ÷ 701 = 2,089 - No remainder! 701 is one of the factors!
2,089 ÷ 701 = 2.98 - There is a remainder. We can't divide by 701 evenly anymore. Let's try the next prime number
2,089 ÷ 709 = 2.9464 - This has a remainder. 709 is not a factor.
2,089 ÷ 719 = 2.9054 - This has a remainder. 719 is not a factor.
2,089 ÷ 727 = 2.8735 - This has a remainder. 727 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
2,089 ÷ 2,089 = 1 - No remainder! 2,089 is one of the factors!

The orange divisor(s) above are the prime factors of the number 250,410,519. If we put all of it together we have the factors 3 x 3 x 19 x 701 x 2,089 = 250,410,519. It can also be written in exponential form as 32 x 191 x 7011 x 2,0891.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 250,410,519.

250,410,519
Factor Arrows
383,470,173
Factor Arrows
327,823,391
Factor Arrows
191,464,389
Factor Arrows
7012,089

More Prime Factorization Examples

250,410,517250,410,518250,410,520250,410,521
71 x 35,772,931121 x 1371 x 913,907123 x 51 x 2571 x 24,35912,6991 x 92,7791

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