Hi all,
I have a question about the size of the present hashrate of the bitcoin network being some 24.000.000 GH/s (source: http://bitcoinwisdom.com/bitcoin/calculator)

If this hashrate would be delivered solely by a cointerra terraminer IV with a capacity of 2.000 GH/s this would mean that the bitcoinnetwork is
(24 million GH/s divided by 2.000 GH/s) 12.000 terraminers strong.

Is this calculation correct?

I had the impression you would need much more machines. Maybe a wrong feeling, but it seems so small.

Maybe a stupid question, but how can you filter on new topics? So you can check which topics were added most recently.

Thanks