Great snubretrosnub trishexacositetrishexacosichoron

The great snubretrosnub trishexacositetrishexacosichoron, or gosirstixtux, is a nonconvex uniform polychoron that consists of 600 great icosahedra and 600 small stellated dodecahedra (falling into pairs in the same hyperplanes, forming 600 compounds of one of each), 600 icosahedra, 2400 octahemioctahedra and 2400 cuboctahedra (forming 2400 compounds of one of each), 600 cubohemioctahedra (forming 120 great antirhombicosahedra), 600 truncated great icosahedra, 600 great dodecicosidodecahedra, 600 rhombidodecadodecahedra, and 600 great ditrigonal dodecicosidodecahedra.

One great icosahedron and one small stellated dodecahedron (two compounds), one icosahedron, four octahemioctahedra and four cuboctahedra (eight compounds), one cubohemioctahedron (one compound), five truncated great icosahedra, five great dodecicosidodecahedra, five rhombidodecadodecahedra, and five great ditrigonal dodecicosidodecahedra join at each vertex.

It can be obtained as the blend of 5 great dipentary dishecatonicosihexacosidishecatonicosachora and 5 great invertidipentary hecatonicosihexacosidishecatonicosachora. In the process, some of the octahemioctahedron and cuboctahedron cells blend out.

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