The Prime Number Spiral (a.k.a. the Ulam Spiral) is constructed as follows: Consider a rectangular grid. We start with the central point and arrange the positive integers in a spiral fashion (anticlockwise). The prime numbers are then marked. There is
If you experience problems getting this program read the help section and
try to use FlashGet or ID Manager. Read our Guide.
Support for Prime Number Spiral is available from the developer or publisher site.
View polyhedra. Hundreds provided (Platonic, Archimedean, Kepler-Poinsot & all other uniform polyhedra, Johnson Solids, Stewart toroids, compounds, geodesics etc). Rotate..
·
·
·
If you experience problems getting this program read the 
View polyhedra. Hundreds provided (Platonic, Archimedean, Kepler-Poinsot & all other uniform polyhedra, Johnson Solids, Stewart toroids, compounds, geodesics etc). Rotate..
