I don't know that they ever did. The least common factor of any set of integers is 1. The greatest common multiple of any set of integers is infinite. Values that are the same for every set of numbers are useless for differentiating between them.
It is not that they do not use them any more - they never used them.
The least common divisor of any set of integers is always 1, so it serves no purpose.
And, there is really no such thing as a "greatest common multiple". Once you find the least common multiple of a set of numbers, you can keep adding the LCM to itself over and over again. Each new number you get will be a common multiple of your set of numbers, but each new number will always be larger than the previous. This means that you can keep adding while the number approaches infinity and you will still never find a greatest multiple.
The Greatest Common Divisor (GCD) for 50 75 is 25.The Least Common Multiple (LCM) for 50 75 is 150.
The Least Common Multiple (LCM) for 120 240 is 240The Greatest Common Divisor (GCD) for 120 240 is 120
The greatest common factor of 540 and 1430 is 10.
In mathematics, the greatest common divisor is also known as the greatest common factor (gcf), highest common factor (hcf), greatest common measure (gcm), or highest common divisor.
24 is the highest common multiple of 3 and 8
The greatest common multiple is an infinite amount and not very practical for problem solving.
The Greatest Common Divisor is 4
The Greatest Common Divisor is 4
The Greatest Common Divisor is 35
The Greatest Common Divisor is 1
The Greatest Common Divisor is 2
The Greatest Common Divisor is 22