Q: What are the prime factors of the number 100,007,776?

 A: 2, 11, 29, 97, 101

Why are those the prime factors of the number 100,007,776?

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 100,007,776

100,007,776
Factor Arrows
250,003,888
Factor Arrows
225,001,944
Factor Arrows
212,500,972
Factor Arrows
26,250,486
Factor Arrows
23,125,243
Factor Arrows
11284,113
Factor Arrows
299,797
Factor Arrows
97101

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, 11, 29, 97, 101

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 29 x 97 x 101 = 100,007,776

This can also be written as 25 x 111 x 291 x 971 x 1011 = 100,007,776

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


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