Great snubspinosnub prismatosnub hexacosipentishexacosichoron

The great snubspinosnub prismatosnub hexacosipentishexacosichoron, or gosanspos xopex, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 1200 great dodecahedra (falling into pairs in the same hyperplanes, forming 600 pentagonal retrosnub pseudodisoctahedra), 2400 cuboctahedra and 2400 cubohemioctahedra (forming 2400 compounds of one of each), 600 octahemioctahedra (forming 120 icosidisicosahedra), 600 rhombidodecadodecahedra, 600 great dodecicosidodecahedra, 600 great dodecicosahedra, and 3600 pentagonal prisms.

One great icosahedron, two great dodecahedra (two compounds), four cuboctahedra and four cubohemioctahedra (eight compounds), one octahemioctahedron (one compound), five rhombidodecadodecahedra, five great dodecicosidodecahedra, five great dodecicosahedra, and five pentagonal prisms join at each vertex.

It can be obtained as the blend of 5 great dipentary hexacositetrishecatonicosachora and 5 great dipentary hecatonicosiprismatohecatonicosihexacosichora. In the process, some of the cuboctahedron and cubohemioctahedron cells blend out.

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