It is a real question. (It's got a question mark at the end.)
On the other hand, it's a very bad question. It shows no attempt at research into the area, for a start: the OP is not aware that this is a fairly trivial and very classical result in arithmetic, and is also not really aware of what a mathematics paper looks like. (It reads a lot like the GCSE coursework that 15-year-olds are forced to do in the UK: lots of 'checking' that your theorem is correct by plugging numbers into it.)
It also has a disappointingly arrogant and non-mathematical feel to it. Not least in the use of the word "theorem", and the compilation of this result into a "paper" or a "book", and the alleged "copyright" at the start (the author accepts no responsibility for errors?!). It's not clear to me that the OP is really asking a mathematical question, even though on the surface that's what the question says.
A comment on that post:
-18, seriously? Am I missing something or is that really how we think about an honest attempt at mathematical creativity...?
Now, don't get me wrong. I fully support all 15-year-olds who want to reinvent theorems that are many millennia old - of course I do, for reasons of mathematical development and maturity - and I'm confident that this was an honest attempt. At least right up until the OP planted a flag and said "right, now all of this is mine".
I've seen a thousand of these, from correct proofs of elementary results to nonsense proofs of Fermat's Last Theorem - my inbox gets spammed up with them on occasion - and they all more or less smell the same. In my experience, it is not how interested schoolchildren or undergraduates talk. The creators of these 'papers' are all looking for a quick route to fame. I think this attitude kind of stinks. And while it could have been handled more tactfully, "not a real question" is perfectly appropriate.