144 = 2 x 2 x 2 x 2 x 3 x 3. So, 2 and 3 are the two prime numbers.
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It is impossible for the product of two prime numbers to be prime. It is impossible for the sum of two prime numbers to be prime as long as one of the numbers isn't 2.
When the numbers are co-prime.
There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
Product of the two prime numbers is the LCM. For example 3, 7 have 21 as LCM
391