Q: What are the prime factors of the number 77,042,475?

 A: 3, 5, 311, 367

Why are those the prime factors of the number 77,042,475?

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 77,042,475

77,042,475
Factor Arrows
325,680,825
Factor Arrows
38,560,275
Factor Arrows
32,853,425
Factor Arrows
5570,685
Factor Arrows
5114,137
Factor Arrows
311367

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, 5, 311, 367

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 5 x 311 x 367 = 77,042,475

This can also be written as 33 x 52 x 3111 x 3671 = 77,042,475

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


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