I am a 15 year old teen and fond of mathematics. I always try to prove mathematical theories and I tried to find how to get pi using an algorithm. Then I found out a way and made an algorithm and inserted it in an Excel sheet and it gave out the first 15 digits after the decimal sign. I just want to know if this is a great deal?
We can't really say much about your algorithm because we don't know it. I think it's perfectly safe to post it on this site, as even if someone tries to "steal" your algorithm and publish before you do, you will have pretty solid evidence that you, in fact, made the original discovery.
However, based on statistics alone, the two most likely options are
- The algorithm already exists.
- The algorithm is wrong.
If the algorithm already exists, then congratulations. Being able to reproduce an existing piece of research on your own at such a young age is amazing! Sure, it may not be someting new yet, but it proves you have a creative brain that will, one day, probably discover something new.
If the algorithm is wrong, then congratulations. Being able to think in new ways, even if they are wrong, is a great talent to have. In time, when you add more knowledge to the mix, you will be able to filter out wrong ideas even further, but thinking of an algorithm proves, again, that you have a creative mind. Keep working, and you'll get far!
I would probably start by trying to determine if your formula is a rediscovery of a known formula. Wikipedia seems quite enthusiastic about this question.