Kolmogorov Complexity

The Kolmogorov complexity of an object (ex: piece of text) is the length of a shortest computer program that produces the object as output.

Example abababababababababababababababab can be written as return "ab" * 16

4c1j5b2p0cv4w1x8rx2y39umgw5q85s7 can only be written as return "4c1j5b2p0cv4w1x8rx2y39umgw5q85s7"