A command line utility that converts an image into an ascii-art prime number. It uses PIL for image processing, numpy when creating the acsii art, and sympy for primality testing.
For example, here is the Github logo as a 2450 digit prime number:
7777777777777777777777777398000000000000008937777777777777777777777777
7777777777777777777730000000000000000000000000000377777777777777777777
7777777777777777700000000000000000000000000000000000077777777777777777
7777777777777700000000000000000000000000000000000000000077777777777777
7777777777720000000000000000000000000000000000000000000000277777777777
7777777779000000000000000000000000000000000000000000000000009777777777
7777777700000000000000000000000000000000000000000000000000000077777777
7777770000000000877790000000000000000000000000000677710000000000777777
7777700000000000777777774000000594444260000006777777770000000000077777
7777000000000000777777777777777777777777777777777777772000000000007777
7770000000000000777777777777777777777777777777777777775000000000000777
7700000000000000777777777777777777777777777777777777770000000000000077
7500000000000004777777777777777777777777777777777777777000000000000057
7000000000000077777777777777777777777777777777777777777700000000000007
9000000000000777777777777777777777777777777777777777777770000000000009
0000000000000777777777777777777777777777777777777777777770000000000000
0000000000000777777777777777777777777777777777777777777770000000000000
0000000000000777777777777777777777777777777777777777777770000000000000
0000000000000777777777777777777777777777777777777777777770000000000000
0000000000000177777777777777777777777777777777777777777770000000000000
9000000000000077777777777777777777777777777777777777777700000000000009
7000000000000007777777777777777777777777777777777777777000000000000007
7500000000000000177777777777777777777777777777777777770000000000000057
7700000000000000009777777777777777777777777777777773000000000000000077
7770000000774000000000477777777777777777777777710000000000000000000777
7777000000077770000000000000777777777777770000000000000000000000007777
7777700000000777700000000007777777777777777000000000000000000000077777
7777770000000077777000000077777777777777777700000000000000000000777777
7777777700000007777777777777777777777777777700000000000000000077777777
7777777779000000077777777777777777777777777700000000000000009777777777
7777777777720000000000000077777777777777777700000000000000277777777777
7777777777777700000000000077777777777777777700000000000077777777777777
7777777777777777700000000077777777777777777700000000077777777777777777
7777777777777777777710000077777777777777777700000377777777777777777777
7777777777777777777777777777777777777777777777777777777777777777779021