boast 1. v. boastÂ·ed, boastÂ·ing, boasts. v. intr. To talk or write about oneself or something related to oneself in a proud or self-admiring way. v. tr.
A supercomputer is a computer that performs at or near the currently highest operational rate for computers. A supercomputer is typically used for scientific and engineering applications that must handle very large databases or do a great amount of computation (or both).
Instead, a program called Superuser is the main signal that your device is rooted. What this program does is that it allows certain applications to gain root access to do things like create wireless hotspots, view your device's files, or other functions that can otherwise only be done by Android support staff.