Great diretrosnub prismatosnub octishexacosichoron

The great diretrosnub prismatosnub octishexacosichoron, or gadersapsox, is a nonconvex uniform polychoron that consists of 600 small stellated dodecahedra and 600 great icosahedra (falling into pairs in the same hyperplanes, forming 600 compounds of one of each), 600 icosahedra and 600 great dodecahedra (forming 600 compounds of one of each), 4800 octahemioctahedra (forming 2400 compounds of two), 600 great ditrigonal dodecicosidodecahedra, 600 icosidodecadodecahedra, 600 quasirhombicosidodecahedra, 600 truncated great icosahedra, and 3600 pentagonal prisms.

One small stellated dodecahedron and one great icosahedron (two compounds), one icosahedron and one great dodecahedron (two compounds), eight octahemioctahedra (eight compounds), five great ditrigonal dodecicosidodecahedra, five icosidodecadodecahedra, five quasirhombicosidodecahedra, five truncated great icosahedra, and five pentagonal prisms join at each vertex.

It can be obtained as the blend of 5 great dipentary trishecatonicosihecatonicosihexacosichora and 5 great dipentary tetrishecatonicosiprismatohexacosichora. In the process, some of the octahemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the great diretrosnub disnub decahecatonicosadishexacosichoron.