More than 1000 CPU solo mining = bitcoin? If I have 1000 (or more) machines with CPU (and no GPU) solo mining (12 hours/day), will it be profitable?

Forget about the costs of electricity, etc...

I want to know if doing more than 1000 machines solo mining (CPU) will win any bitcoin?
If those are reasonably decent CPUs, they could be able to mine up to 20 Mhash/s each. Together, that's 20 Ghash/s, or the same as a small ASIC, and using massively more electricity.

As of december 2013, with the difficulty at 707408283, this means that you'd have approximately a 0.85% chance per month to win a block (worth 25 BTC).