Q: What are the prime factors of the number 278,960?

 A: 2, 5, 11, 317

Why are those the prime factors of the number 278,960?

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 278,960

278,960
Factor Arrows
2139,480
Factor Arrows
269,740
Factor Arrows
234,870
Factor Arrows
217,435
Factor Arrows
53,487
Factor Arrows
11317

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, 5, 11, 317

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 317 = 278,960

This can also be written as 24 x 51 x 111 x 3171 = 278,960

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


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