User blog comment:Alemagno12/Brain-Flak Challenge/@comment-2604:6000:111D:1739:A1B6:DE3A:489:82EA-20180920195317

You can raise your upper bound for Flak(24) to 1048712 with the program:

((((){}){})){({}[]<(({}){})>)}{}{}

Similarly Flak(25) and Flak(26) can be raised

Flak(25) >= 402653484   (((((){}){}){})){({}[]<(({}){})>)}{}{} Flak(26) >= 137438954000 (((((){}){}){})){({}[]<(({}){})>)}{}{}