Q: What is the prime factorization of the number 606,176,303?

Why is the prime factorization of 606,176,303 written as 23,081¹ x 26,263¹?

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 606,176,303

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 606,176,303 by 2

606,176,303 ÷ 2 = 303,088,151.5 - This has a remainder. Let's try another prime number.
606,176,303 ÷ 3 = 202,058,767.6667 - This has a remainder. Let's try another prime number.
606,176,303 ÷ 5 = 121,235,260.6 - This has a remainder. Let's try another prime number.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
606,176,303 ÷ 23,081 = 26,263 - No remainder! 23,081 is one of the factors!
26,263 ÷ 23,081 = 1.1379 - There is a remainder. We can't divide by 23081 evenly anymore. Let's try the next prime number
26,263 ÷ 23,087 = 1.1376 - This has a remainder. 23,087 is not a factor.
26,263 ÷ 23,099 = 1.137 - This has a remainder. 23,099 is not a factor.
26,263 ÷ 23,117 = 1.1361 - This has a remainder. 23,117 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
26,263 ÷ 26,263 = 1 - No remainder! 26,263 is one of the factors!

The orange divisor(s) above are the prime factors of the number 606,176,303. If we put all of it together we have the factors 23,081 x 26,263 = 606,176,303. It can also be written in exponential form as 23,081¹ x 26,263¹.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 606,176,303.

	606,176,303
23,081		26,263

More Prime Factorization Examples

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