Q: What are the prime factors of the number 305,152?

 A: 2, 149

Why are those the prime factors of the number 305,152?

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 305,152

305,152
Factor Arrows
2152,576
Factor Arrows
276,288
Factor Arrows
238,144
Factor Arrows
219,072
Factor Arrows
29,536
Factor Arrows
24,768
Factor Arrows
22,384
Factor Arrows
21,192
Factor Arrows
2596
Factor Arrows
2298
Factor Arrows
2149

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, 149

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 2 x 2 x 2 x 2 x 149 = 305,152

This can also be written as 211 x 1491 = 305,152

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


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