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The GCF is 1.
37 is prime. 3 x 13 = 39 The GCF is 1.
The GCF is 39.
The GCF of 39 & 14 is 1.
gcf of 37 and 81 is 1.
The GCF is 37.
The GCF is 1
The GCF is 3.
The GCF is: 13