50 cpus at my disposal, would like to mine primecoin

[c1010010]

The difficulty rise is hard to project, but you should do a couple of data point analyses with increasing difficulty.

Look at the exponential growth of BTC diff.

[mokimarket]

I have a guy that wants to mine 1000s of these things a day. Cost and electricity is not an issue at all...

I think it impossible. There are only about 14k XPMs available to be mined a day. You need serious mining power to get "1000s of these things a day". Are you sure he has so much funds and electricity to get.. say 10% of the network? BTW, if that would happen he would raise difficulty.

Interesting. I will let him know that. I don't think he's really concerned about money or power, but I don't think we should be taking 10% of the network power. I'm thinking a 1-2% is where we want to be.