The Megaminx is a puzzle in the shape of a dodecahedron that was first produced by Uwe Meffert, who has the rights to some of the patents. Each of the 12 sides consists of one pentagonal fixed center, five triangular edge pieces and five corner pieces. The corner and edge pieces are arranged in a five-pointed star pattern. A variant where the cuts are a little deeper, so that each face has a five-pointed star on it, is known as the Hungarian Supernova, but since it is similar these names are often interchanged.
The way the Megaminx functions is very similar to the 3x3x3: it has fixed centers, edges with two orientations, and corners with three orientations, and each turn moves the same number of edges and corners. Because of this it can be (and usually is) solved with a variant on a 3x3x3 method, either by placing edges and then corner/edge pairs (like the Fridrich method) or simply building a series of blocks (like the Petrus method). It is also possible to finish using some OLL and PLL algorithms. The biggest difference from the 3x3 is that slice moves are not possible and therefore methods that solves edges preserving corners are having much longer algorithms.
It has 1.01 x 10^68 positions on the 12 color version and 6.14 x 10^63 positions on the 6 color version.
The current world record for a single solve is 37.58 seconds set at Spring Comes 2015, and the world record for an average of 5 is 42.89 seconds set at Asian Championship 2014, both being held by Yu Da-Hyun.