Answer:
Step-by-step explanation:
....... shouldn't that be a question instead of an answer? Well, I guess it is what it is, and I understand it thx anyways. (=^\/^=)
The ones that match are
1 and 5
2 and 6
7 and 3
8 and 4
So it is the product of
And 2,5 and 11 are prime numbers, so there you go :)