User blog comment:XXxKennyDashxXx/A NEW NOTATION! HBAN./@comment-25291678-20141227153743

The only notation that I know surpasses the lastest extension of HBAN (ASHBAN) is the extension s of R-Function, and uncomputable functions, like Rayo's function, FOOT, Xi, BB, everything. But so far, nobody has been able to create a number that's computable, that's also larger than BIG FOOT.