Q: What are the prime factors of the number 77,750?

 A: 2, 5, 311

Why are those the prime factors of the number 77,750?

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 77,750

77,750
Factor Arrows
238,875
Factor Arrows
57,775
Factor Arrows
51,555
Factor Arrows
5311

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, 311

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 5 x 311 = 77,750

This can also be written as 21 x 53 x 3111 = 77,750

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


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