Pseudorhombic small hexacosihecatonicosachoron

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

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