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 Description  
 Relatively Prime Numbers:  Two integers which do not have any common factors other than 1 or -1.

Numbers

Factors

Common Factors

GCF

32

±1, ±2, ±4, ±8, 16, ±32

±1

1

65

±1, ±5, ±13, ±65

Note that in this example neither 32 nor 65 is prime. Since they have the numbers 1 and -1 as the only common factors, 32 and 65 are relatively prime to each other.