Great ditrigonary trishecatonicosihexacosichoron

The great ditrigonary trishecatonicosihexacosichoron, or giddit thix, is a nonconvex uniform polychoron that consists of 600 octahedra, 120 icosidodecahedra, 120 great icosicosidodecahedra, and 120 small dodecicosahedra. Three octahedra, three icosidodecahedra, six great icosicosidodecahedra, and six small dodecicosahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the rectified small ditrigonary hexacosihecatonicosachoron.