The numbers are co-prime.
The greatest common factor of 18 and 55 is 1.
The greatest common factor of 52 and 81 is 1
The greatest common factor of 31 and 46 is 1.
The Greatest Common Factor of 3, 11 is 1.
All numbers have a common factor of 1. Sometimes that's the only common factor.
The greatest common factor of 1-x3 is 1, dummy.
The Greatest Common Factor (GCF) of 1 and 12 is 1
21
The Greatest Common Factor (GCF) is: 1
The GCF is 1.
The Greatest Common Factor of 3, 8, 12: 1
The greatest common factor is 1