Quote:
Originally posted by C3
Actually, they're not the same thing. The first definition includes three numbers: the number itself, 1, and one other number. So in the example "9", there are two sets of factors, but only 3 numbers (1, 3, 9). With the second definition, there is a possibility of 4 numbers: 1, 3, 11, 33. I guess the first definition is just more restrictive.

I may have read the first definition a bit wrong. When you say that they are divisible by 1 and "only one" other number...now I get it. But still, I teach algebra at a community college. I have
still never heard of SemiPrime numbers before within our curriculum!