Acronym	girfthi
Name	great retrofrustary trishecatonicosachoron
Cross sections	©
Circumradius	sqrt(5) = 2.236068
Vertex figure	©
Colonel of regiment	affixthi
Face vector	3600, 14400, 7680, 360
External links

As abstract polytope girfthi is isomorphic to safthi, thereby replacing pentagons by pentagrams and decagons by decagrams, resp. giid by siid, saddid by gaddid, and siddy by giddy.

Incidence matrix

3600 ♦    4    4 |    2    4    4    2 |   2   2   2
-----+-----------+---------------------+------------
   2 | 7200    * |    1    1    1    0 |   1   1   1
   2 |    * 7200 |    0    1    1    1 |   1   1   1
-----+-----------+---------------------+------------
   5 |    5    0 | 1440    *    *    * |   1   1   0
   6 |    3    3 |    * 2400    *    * |   1   0   1
  10 |    5    5 |    *    * 1440    * |   0   1   1
   3 |    0    3 |    *    *    * 2400 |   1   1   0
-----+-----------+---------------------+------------
  60 |   60   60 |  12    20    0   20 | 120   *   *  giid
  60 |   60   60 |  12     0   12   20 |   * 120   *  saddid
  60 |   60   60 |   0    20   12    0 |   *   * 120  siddy