Q: What are the prime factors of the number 25,151,121?

 A: 3, 23, 101, 401

Why are those the prime factors of the number 25,151,121?

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 25,151,121

25,151,121
Factor Arrows
38,383,707
Factor Arrows
32,794,569
Factor Arrows
3931,523
Factor Arrows
2340,501
Factor Arrows
101401

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, 23, 101, 401

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 23 x 101 x 401 = 25,151,121

This can also be written as 33 x 231 x 1011 x 4011 = 25,151,121

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


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