Great diretrosnub prismatosnub dishexacosipentishexacosichoron

The great diretrosnub prismatosnub dishexacosipentishexacosichoron, or gadersposid xopex, is a nonconvex uniform polychoron that consists of 1200 great icosahedra (falling into pairs into the same hyperplane, forming 600 small retrosnub disoctahedra), 600 icosahedra and 600 great dodecahedra (also compounding into 600 compounds of one icosahedron and one great dodecahedron), 4800 octahemioctahedra (forming 2400 compounds of two octahemioctahedra), 600 great dodecicosahedra, 600 truncated great icosahedra, 600 quasirhombicosidodecahedra, and 3600 pentagonal prisms.

Two great icosahedra (two compounds), one icosahedron and one great dodecahedron (two compounds), eight octahemioctahedra (eight compounds), five great dodecicosahedra, five truncated great icosahedra, five quasirhombicosidodecahedra, and five pentagonal prisms join at each vertex.

This polychoron can be obtained as the blend of 5 great dipentary dishecatonicosihexacosihecatonicosachora and 5 great dipentary tetrishecatonicosiprismatohexacosichora. In the process some of the octahemioctahedra blend out fully, while the other cells compound as noted above.

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