Grand retroditetrahedronary prismatohexacosihecatonicosachoron

The grand retroditetrahedronary prismatohexacosihecatonicosachoron, or gardtapaxhi, is a nonconvex uniform polychoron that consists of 600 tetrahedra, 720 pentagrammic prisms, and 120 quasirhombicosidodecahedra. Four tetrahedra, twelve pentagrammic prisms, and twelve quasirhombicosidodecahedra join at each vertex.

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