What's euler brick?
https://en.wikipedia.org/wiki/Euler_brick

In mathematics, an Euler brick, named after Leonhard Euler, is a rectangular cuboid whose edges and face diagonals all have integer lengths. A primitive Euler brick is an Euler brick whose edge lengths are relatively prime.
A perfect cuboid (also called a perfect box) is an Euler brick whose space diagonal also has integer length.
As of May 2017, no example of a perfect cuboid had been found and no one has proven that none exist.

If you get one perfect cuboid, you make history!!!

Start now

Download here:
https://sourceforge.net/projects/eulerbricks/
Source Code here:
https://github.com/pingdi-zuo/eulerbricks

Specification
    Like bitcoin but the alt alg.