Q: What are the prime factors of the number 258,341,248?

 A: 2, 11, 17, 43, 251

Why are those the prime factors of the number 258,341,248?

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 258,341,248

258,341,248
Factor Arrows
2129,170,624
Factor Arrows
264,585,312
Factor Arrows
232,292,656
Factor Arrows
216,146,328
Factor Arrows
28,073,164
Factor Arrows
24,036,582
Factor Arrows
22,018,291
Factor Arrows
11183,481
Factor Arrows
1710,793
Factor Arrows
43251

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, 11, 17, 43, 251

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 11 x 17 x 43 x 251 = 258,341,248

This can also be written as 27 x 111 x 171 x 431 x 2511 = 258,341,248

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


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