What is the max no of vusers you have used in your recent project?

What is the max no of vusers you have used in your recent project?We have used 1000 vuser, because we have license only for 1000 users, our company is in the process of buying 500 more vusers from mercury. Normally you try to give the figure in between 200 to 1000 vusers. Most of the companies will have up to 500 vusers license. Merely do not say that you have used 5000 vusers at a time.