Q: What are the prime factors of the number 777,205,506?

 A: 2, 3, 7, 11, 13903

Why are those the prime factors of the number 777,205,506?

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 777,205,506

777,205,506
Factor Arrows
2388,602,753
Factor Arrows
3129,534,251
Factor Arrows
718,504,893
Factor Arrows
111,682,263
Factor Arrows
11152,933
Factor Arrows
1113,903

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:

2, 3, 7, 11, 13903

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 11 x 11 x 11 x 13,903 = 777,205,506

This can also be written as 21 x 31 x 71 x 113 x 13,9031 = 777,205,506

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


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