149 and 1000 have no common factor except the number 1.
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Factors of 121: 1, 11, 121.
Factors of 1000: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000.
GCF (121, 1000) = 1
The greatest common factor of 21 and 121 is 1. (21 and 121 are relatively prime.)
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 20 and 121 is 1
The GREATEST common factor is 11.
The GCF is 11.
It is: 11