Q: What is the prime factorization of the number 4,767,313?

Why is the prime factorization of 4,767,313 written as 373¹ x 12,781¹?

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 4,767,313

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.

Here are the first several prime factors: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29...

Let's start by dividing 4,767,313 by 2

4,767,313 ÷ 2 = 2,383,656.5 - This has a remainder. Let's try another prime number.
4,767,313 ÷ 3 = 1,589,104.3333 - This has a remainder. Let's try another prime number.
4,767,313 ÷ 5 = 953,462.6 - This has a remainder. Let's try another prime number.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
4,767,313 ÷ 373 = 12,781 - No remainder! 373 is one of the factors!
12,781 ÷ 373 = 34.2654 - There is a remainder. We can't divide by 373 evenly anymore. Let's try the next prime number
12,781 ÷ 379 = 33.723 - This has a remainder. 379 is not a factor.
12,781 ÷ 383 = 33.3708 - This has a remainder. 383 is not a factor.
12,781 ÷ 389 = 32.856 - This has a remainder. 389 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
12,781 ÷ 12,781 = 1 - No remainder! 12,781 is one of the factors!

The orange divisor(s) above are the prime factors of the number 4,767,313. If we put all of it together we have the factors 373 x 12,781 = 4,767,313. It can also be written in exponential form as 373¹ x 12,781¹.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 4,767,313.

	4,767,313
373		12,781

More Prime Factorization Examples

Try the factor calculator