Yes, it seems like it is changing every minute or so (or perhaps it's just my imagination), which makes it pretty difficult to test all the hashes even if trying millions. I might have to switch to a faster language :(
> it is changing every minute or so
It is, just like in Bitcoin - there are bot miners you are racing against (otherwise the provided miner.sh would eventually work)
> I might have to switch to a faster language :(
Probably not, I did it in python.
There's a systems problem in how the miner is architected that you can tweak to give you a better chance of winning the race.