Pseudorhombic great hexacosihecatonicosachoron

The pseudorhombic great hexacosihecatonicosachoron, or pirgixhi, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 1200 triangular prisms, and 120 great quasitruncated icosidodecahedra. Two truncated tetrahedra, two triangular prisms, and four great quasitruncated icosidodecahedra join at each vertex.

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