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The greatest common factor (GCF) of two numbers is the largest number that divides both numbers without leaving a remainder. To find the GCF of 81 and 256, you can use prime factorization. Prime factorizing 81 gives you 3^4, and prime factorizing 256 gives you 2^8. The common factors between 81 and 256 are 1, 3, and 9. Therefore, the GCF of 81 and 256 is 9.

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There is no gcf. The factors of 81 are 1, 3, 9, 27, and 81.

3, 9, 27, and 81 do not go into 256 evenly. Therefore, there are no common factors.

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Wiki User

13y ago
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Q: What is the GCF of 81 and 256?
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