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768 is even, so let's start by dividing it by 2.

768

= 2 x 384

= 2 x 2 x 192

= 2 x 2 x 2 x 96

= 2 x 2 x 2 x 2 x 48

= 2 x 2 x 2 x 2 x 2 x 24

= 2 x 2 x 2 x 2 x 2 x 2 x 12

= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 6

= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3

The end number is now prime, so the prime factorisation is complete.

768 = 28 x 3.

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12y ago

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