Q: What are the prime factors of the number 611,655,120?

 A: 2, 3, 5, 509, 1669

Why are those the prime factors of the number 611,655,120?

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 611,655,120

611,655,120
Factor Arrows
2305,827,560
Factor Arrows
2152,913,780
Factor Arrows
276,456,890
Factor Arrows
238,228,445
Factor Arrows
312,742,815
Factor Arrows
34,247,605
Factor Arrows
5849,521
Factor Arrows
5091,669

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, 5, 509, 1669

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 5 x 509 x 1,669 = 611,655,120

This can also be written as 24 x 32 x 51 x 5091 x 1,6691 = 611,655,120

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


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