It was built on an open source lamp framework that is not suited to this scale of project.
You can download the software at github
Read this article....you will soon realize why ObamaWare is a complete disaster...
http://www.theatlantic.com/technology/archive/2013/06/healthcaregov-code-developed-by-the-people-and-for-the-people-released-back-to-the-people/277295/#comments