The Professor Cube is a 5x5x5 Rubik's Cube variant. It has many similarities to the Rubik's Revenge, but is fundamentally different due to having odd-numbered dimensions. Like the standard Rubik's Cube, the centers maintain their location no matter how you turn it.
The current record for solving the Professor's Cube in an official competition is 48.42 seconds, set by Feliks Zemdegs
. Feliks Zemdegs from Australia holds the current world record for an average of five solves, 51 secs seconds, set at the Melbourne Summer 2012.