Pseudorhombic small hecatonicosihexacosichoron

The pseudorhombic small hecatonicosihexacosichoron, or pirshix, is a nonconvex uniform polychoron that consists of 120 truncated icosahedra, 720 pentagonal prisms, and 600 truncated octahedra. Two truncated icosahedra, two pentagonal prisms, and four truncated octahedra join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the small rhombated great hecatonicosachoron.