Also, you probably know this but there is a prize for compressing bits of Wikipedia. Here's the wikipedia page about it: https://en.wikipedia.org/wiki/Hutter_Prize
http://prize.hutter1.net/
About the test data: http://mattmahoney.net/dc/textdata.html
And discussion on HN: https://news.ycombinator.com/item?id=7405129
Also, you probably know this but there is a prize for compressing bits of Wikipedia. Here's the wikipedia page about it: https://en.wikipedia.org/wiki/Hutter_Prize
http://prize.hutter1.net/
About the test data: http://mattmahoney.net/dc/textdata.html
And discussion on HN: https://news.ycombinator.com/item?id=7405129