James A. Bowery wrote:
Named for the discoverer of the proof and the initial 50,000 Euro donor, the Hutter Prize currently targets the compression of a 100 megabyte sample of human knowledge drawn from the broadly based Wikipedia online encyclopedia.
Although I doubt we have many AI researchers on this list who would be interested in competing for this prize, some readers here might be interested in the related statistical analysis of Wikipedia's text, performed by AI researcher Matt Mahoney:
http://cs.fit.edu/~mmahoney/compression/textdata.html
-- Tim Starling