Yes, always. This is the easiest way to find the LCM of two (or indeed any number of) primes.
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Yes - if two numbers share no common factors (besides 1) the least common multiple will be the product of the numbers.
The least common multiple of two numbers is the product of those two numbers, divided by the greatest common factor of those two numbers. Two numbers that are relatively prime have a greatest common factor of 1. So, when the two numbers are relatively prime, the least common multiple is the product of both numbers divided by 1. So, when two numbers are relatively prime, the least common multiple is the product of the two numbers.this is wron
the least common multiple of 5 and 6 is 30 and 30 is the product of 5*6
Their product.
That's the least common multiple, or LCM.