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Two numbers are coprime if they have unity (1) as their only common factor.

Example 1: 17 and 19 - any two prime numbers are also coprime.

Example 2: 15 and 64 - neither is a prime, but they have no common factor except. The factorizations are 3x5 and 1x15; and 1 x 64 and 26, respectively.

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13y ago

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