Q: What is the prime factorization of the number 1,348,848?

 A:
  • The prime factors are: 2 x 2 x 2 x 2 x 3 x 3 x 17 x 19 x 29
    • or also written as { 2, 2, 2, 2, 3, 3, 17, 19, 29 }
  • Written in exponential form: 24 x 32 x 171 x 191 x 291

Why is the prime factorization of 1,348,848 written as 24 x 32 x 171 x 191 x 291?

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 1,348,848

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 1,348,848 by 2

1,348,848 ÷ 2 = 674,424 - No remainder! 2 is one of the factors!
674,424 ÷ 2 = 337,212 - No remainder! 2 is one of the factors!
337,212 ÷ 2 = 168,606 - No remainder! 2 is one of the factors!
168,606 ÷ 2 = 84,303 - No remainder! 2 is one of the factors!
84,303 ÷ 2 = 42,151.5 - There is a remainder. We can't divide by 2 evenly anymore. Let's try the next prime number
84,303 ÷ 3 = 28,101 - No remainder! 3 is one of the factors!
28,101 ÷ 3 = 9,367 - No remainder! 3 is one of the factors!
9,367 ÷ 3 = 3,122.3333 - There is a remainder. We can't divide by 3 evenly anymore. Let's try the next prime number
9,367 ÷ 5 = 1,873.4 - This has a remainder. 5 is not a factor.
9,367 ÷ 7 = 1,338.1429 - This has a remainder. 7 is not a factor.
9,367 ÷ 11 = 851.5455 - This has a remainder. 11 is not a factor.
...
Keep trying increasingly larger numbers until you find one that divides evenly.
...
9,367 ÷ 17 = 551 - No remainder! 17 is one of the factors!
551 ÷ 17 = 32.4118 - There is a remainder. We can't divide by 17 evenly anymore. Let's try the next prime number
551 ÷ 19 = 29 - No remainder! 19 is one of the factors!
29 ÷ 19 = 1.5263 - There is a remainder. We can't divide by 19 evenly anymore. Let's try the next prime number
29 ÷ 23 = 1.2609 - This has a remainder. 23 is not a factor.
29 ÷ 29 = 1 - No remainder! 29 is one of the factors!

The orange divisor(s) above are the prime factors of the number 1,348,848. If we put all of it together we have the factors 2 x 2 x 2 x 2 x 3 x 3 x 17 x 19 x 29 = 1,348,848. It can also be written in exponential form as 24 x 32 x 171 x 191 x 291.

Factor Tree

Another way to do prime factorization is to use a factor tree. Below is a factor tree for the number 1,348,848.

1,348,848
Factor Arrows
2674,424
Factor Arrows
2337,212
Factor Arrows
2168,606
Factor Arrows
284,303
Factor Arrows
328,101
Factor Arrows
39,367
Factor Arrows
17551
Factor Arrows
1929

More Prime Factorization Examples

1,348,8461,348,8471,348,8491,348,850
21 x 791 x 8,53711,348,84711,348,849121 x 52 x 531 x 5091

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