Grand ditetrahedronary prismatohexacosicubihecatonicosachoron

The grand ditetrahedronary prismatohexacosicubihecatonicosachoron, or gadtapaxchi, is a nonconvex uniform polychoron that consists of 600 tetrahedra, 600 cubes, 720 pentagrammic prisms, and 120 great dodecicosidodecahedra. Four tetrahedra, eight cubes, twelve pentagrammic prisms, and twelve great dodecicosidodecahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the grand ditetrahedronary hexacosidishecatonicosachoron.