nevermind i unerstand now

The description is correct! Youâ€™re interpreting it wrong. Compare it to a syntactically equivalent statement like â€śsum of two (not necessarily distinct) integersâ€ť. Itâ€™s clear what â€śnot necessarily distinctâ€ť refers to.

definition of not necessarily - possibly but not certainly - used to say that something is not definitely true. So what you said â€śsum of two ( possibly but not certainly distinct) integersâ€ť sounds like they could be distinct but dont have to be. Might have just said â€śâ€¦ of two distinct primesâ€ť.

The two **semi-primes** you sum are possibly but not necessarily distinct, i.e. the semi-primes a and b that you sum to get a+b are allowed to be equal. Earlier in the problem description they explained exactly what they mean by semi-primes: *â€śA semi-prime number is an integer which can be expressed as a product of two distinct primes.â€ť*

oic, thanks for clarification i just thought its confusing