Q: What are the prime factors of the number 125,515,712?

 A: 2, 7, 29, 9661

Why are those the prime factors of the number 125,515,712?

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 125,515,712

125,515,712
Factor Arrows
262,757,856
Factor Arrows
231,378,928
Factor Arrows
215,689,464
Factor Arrows
27,844,732
Factor Arrows
23,922,366
Factor Arrows
21,961,183
Factor Arrows
7280,169
Factor Arrows
299,661

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, 7, 29, 9661

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 7 x 29 x 9,661 = 125,515,712

This can also be written as 26 x 71 x 291 x 9,6611 = 125,515,712

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


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