Q: What is the prime factorization of the number 343,254,216?

 A:
  • The prime factors are: 2 x 2 x 2 x 3 x 941 x 15,199
    • or also written as { 2, 2, 2, 3, 941, 15,199 }
  • Written in exponential form: 23 x 31 x 9411 x 15,1991

Why is the prime factorization of 343,254,216 written as 23 x 31 x 9411 x 15,1991?

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 343,254,216

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 343,254,216 by 2

343,254,216 ÷ 2 = 171,627,108 - No remainder! 2 is one of the factors!
171,627,108 ÷ 2 = 85,813,554 - No remainder! 2 is one of the factors!
85,813,554 ÷ 2 = 42,906,777 - No remainder! 2 is one of the factors!
42,906,777 ÷ 2 = 21,453,388.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
42,906,777 ÷ 3 = 14,302,259 - No remainder! 3 is one of the factors!
14,302,259 ÷ 3 = 4,767,419.6667 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
14,302,259 ÷ 5 = 2,860,451.8 - This has a remainder. 5 is not a factor.
14,302,259 ÷ 7 = 2,043,179.8571 - This has a remainder. 7 is not a factor.
14,302,259 ÷ 11 = 1,300,205.3636 - This has a remainder. 11 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
14,302,259 ÷ 941 = 15,199 - No remainder! 941 is one of the factors!
15,199 ÷ 941 = 16.152 - There is a remainder. We can't divide by 941 evenly anymore. Let's try the next prime number
15,199 ÷ 947 = 16.0496 - This has a remainder. 947 is not a factor.
15,199 ÷ 953 = 15.9486 - This has a remainder. 953 is not a factor.
15,199 ÷ 967 = 15.7177 - This has a remainder. 967 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
15,199 ÷ 15,199 = 1 - No remainder! 15,199 is one of the factors!

The orange divisor(s) above are the prime factors of the number 343,254,216. If we put all of it together we have the factors 2 x 2 x 2 x 3 x 941 x 15,199 = 343,254,216. It can also be written in exponential form as 23 x 31 x 9411 x 15,1991.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 343,254,216.

343,254,216
Factor Arrows
2171,627,108
Factor Arrows
285,813,554
Factor Arrows
242,906,777
Factor Arrows
314,302,259
Factor Arrows
94115,199

More Prime Factorization Examples

343,254,214343,254,215343,254,217343,254,218
21 x 411 x 4491 x 9,323151 x 68,650,8431371 x 9,277,141121 x 6411 x 267,7491

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