Q: What are the prime factors of the number 643,252,256?

 A: 2, 17, 1182449

Why are those the prime factors of the number 643,252,256?

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 643,252,256

643,252,256
Factor Arrows
2321,626,128
Factor Arrows
2160,813,064
Factor Arrows
280,406,532
Factor Arrows
240,203,266
Factor Arrows
220,101,633
Factor Arrows
171,182,449

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, 17, 1182449

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 17 x 1,182,449 = 643,252,256

This can also be written as 25 x 171 x 1,182,4491 = 643,252,256

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


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