Pentagonal retroprismatoverted hexacosihecatonicosachoron

The pentagonal retroprismatoverted hexacosihecatonicosachoron, or prap vixhi, is a nonconvex uniform polychoron that consists of 120 regular icosahedra and 600 truncated tetrahedra. 2 icosahedra and 10 truncated tetrahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the rectified great stellated hecatonicosachoron.