The LCM or least common multiple is 253. In this case, the greatest common factor of the two numbers is 1. That is to say, they have no other common factors. We call these numbers relatively prime. When two numbers are relatively prime their LCM is always the product of the two numbers.
Sometimes it is easier to find the greatest common factor than to find the least common multiple by looking at multiples of both numbers. This is true if the numbers are primes like 11 and 23. So if you are give two primes, the LCM will always be the product of the two numbers.
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What is the least common multiple of 11 23?
The Least Common Multiple (LCM) of 11, 22 and 50 is 550.
The least common multiple of 23 and 47 is 1081.
The least common multiple of 3 , 23 = 69
The Least Common Multiple (LCM) of (12,23) is 276.