Great spinoretrosnub snub prismatosnub trishexacosipentishecatonicosachoron

The great spinoretrosnub snub prismatosnub trishexacosipentishecatonicosachoron, or gnarsis pistaxphi, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 600 great dodecahedra, 2400 octahemioctahedra and 2400 cubohemioctahedra (falling into pairs in the same hyperplanes, forming 2400 compounds of one of each), 600 cuboctahedra (forming 120 antirhombicosicosahedra), 600 great dodecicosahedra, 3000 truncated tetrahedra (600 of which form 120 truncated chiricosahedra), and 3600 pentagonal prisms.

One great icosahedron, one great dodecahedron, four octahemioctahedra and four cubohemioctahedra (eight compounds), one cuboctahedron (one compound), five great dodecicosahedra, five truncated tetrahedra (one compound, four single), and five pentagonal prisms join at each vertex.

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

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