[amadeusz]

Current default is 100. You can also use maxwin command (for example 'maxwin 200', up to 2048) in your screenrc file to define other value, no need to recompile. However do note that you can't change it in already started screen.

[LinuxBender]

This limit must be due to the older versions we have in CentOS 6. screen-4.0.3-19.el6.x86_64