Q: What are the prime factors of the number 311,283?

 A: 3, 7, 61

Why are those the prime factors of the number 311,283?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 311,283

311,283
Factor Arrows
3103,761
Factor Arrows
334,587
Factor Arrows
311,529
Factor Arrows
33,843
Factor Arrows
31,281
Factor Arrows
3427
Factor Arrows
761

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

3, 7, 61

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 3 x 7 x 61 = 311,283

This can also be written as 36 x 71 x 611 = 311,283

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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