Q: What are the prime factors of the number 668,811?

 A: 3, 11, 13, 1559

Why are those the prime factors of the number 668,811?

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 668,811

668,811
Factor Arrows
3222,937
Factor Arrows
1120,267
Factor Arrows
131,559

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, 11, 13, 1559

We can check our work by multiplying all of the prime factors together: 3 x 11 x 13 x 1,559 = 668,811

This can also be written as 31 x 111 x 131 x 1,5591 = 668,811

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


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