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When the bottom branch consists entirely of prime numbers.

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A factor tree isn't complete until all the factors are prime. If any of the factors are composite, you know the factor tree is not complete.

A factor tree is a way to notate the process of finding the prime factorization of a given number. A factor tree is complete when the bottom branch (row) consists entirely of prime numbers.

Q: What is a factor tree and how do youknow when a factor tree is complete?

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83 is prime. No tree.

61 is already prime. It doesn't need a tree.

The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.

145 5,29 Not much of a tree. More like a factor shrub.

the factor tree of 100100^50,2^25,2,2^5,5,2,21111

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no it does not matter what two factors you select to complete a factor tree (i just learned that today in class :D)

873 x 29Since both 3 and 29 are prime numbers, the factor tree is complete.

A factor tree is a representation of the process of finding the prime factorization of a given number. It's complete when the bottom branch consists entirely of prime numbers.

A factor tree of 78: 78 6 x 13 (2x3) x 13 Since 2, 3, and 13 are prime numbers, the factor tree is complete.

253 11 x 23 Both 11 and 23 are prime numbers, so the factor tree is complete.

133 7 x 19 Both 7 and 19 are prime numbers, so the factor tree is complete.

Yes. Factors that complete a factor tree need to be prime. However, it doesn't matter what two factors you select to start a factor tree.

When the bottom branch is all prime numbers.

you use a factor tree

125 5 x 25 5 x (5x5) Since 5 is a prime number, the factor tree is complete.

62525 x 25(5x5) x (5x5)Since 5 is a prime number, the factor tree is complete.625125,525,5,55,5,5,5

242 2 x 121 2 x (11x11) Since 2 and 11 are prime numbers, the factor tree is complete.