Prime factors math worksheets

What are the prime factors of 136?

Dividing 136 by the smallest prime number, 2.

136 ÷ 2 = 68

136 = 2 x 68

Dividing 68 by the smallest prime number, 2.

68 ÷ 2 = 34

136 = 2 x 2 x 34

Dividing 34 by the smallest prime number, 2.

34 ÷ 2 = 17

136 = 2 x 2 x 2 x 17

Dividing 17 by the smallest prime number, 2.

17 ÷ 2 = 8.5, not an integer (whole number so move on to the next prime number)

Once you have found a prime factor, keep dividing the remainder by the same prime factor until the remainder is no longer a whole number (an integer). When that happens, move on to the next prime number.

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