I have written a simple python programme to compute number of cylces (shortcut form) needed for particular number before reducing to 1. Many renowned mathematicians Lothar Collatz ,Paul Erdös , Terence Tao etc . worked on this conjecture.But today 's mathematics is incapable of proofing such conjectures . Many super computers imployed but mathematicians are not satisfied with brute force computer proofs.
Ref:- Wikipedia