Q: What are the prime factors of the number 254,678,256?

 A: 2, 3, 7, 67, 419

Why are those the prime factors of the number 254,678,256?

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 254,678,256

254,678,256
Factor Arrows
2127,339,128
Factor Arrows
263,669,564
Factor Arrows
231,834,782
Factor Arrows
215,917,391
Factor Arrows
35,305,797
Factor Arrows
31,768,599
Factor Arrows
3589,533
Factor Arrows
3196,511
Factor Arrows
728,073
Factor Arrows
67419

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, 67, 419

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 67 x 419 = 254,678,256

This can also be written as 24 x 34 x 71 x 671 x 4191 = 254,678,256

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


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