Re: == Bitcoin challenge transaction: ~100 BTC total bounty to solvers! ==UPDATED==
So write that you are selling a slow algorithm, and there is no time to test it in practice. 
On the video there is testing the algorithm in single-threaded python execution mode. What else is needed?
I made a multi-threaded and economical memory option, and I sell it. It can still be improved, but I do not have time.