You can't. You have throw away that number and compute a valid number. It costs about $2k to buy 1 ghps, which burns .2 joule/gh at $0.1/kwh, and which gives you a 1.3x10^-8 chance at every 25 btc block reward (one every 9 minutes). That difficulty increases 20% at each adjustment, every 12.8 days. Now calculate.
[I wonder especially about the "Total network hash rate: NHR = 65'000'000 GH/s", is that really per second, per day, or what?]
there is no way to really calculate the total hash rate, we can only estimate based on the current difficulty and the speed at which blocks are created.
luck plays a role, and the hashrate estimate seems to be fluctuating between 65-85 peta hashes per second currently, so the blockchain data seems roughly close enough. (source =
http://bitcoin.sipa.be/ )
And yes, that is actually 65
Trillion Quadrillion hashes per second. pretty impressive for an open-source beta project, don't you think?
-also, just noticed this part
Technology-dependent data:
Cost of equipment: CEQ = 2000 USD/(GH/s) (modern equipment)
[Source: @aminorex]
I think that's a typo or something, should be closer to 2000 USD/(TH/s) I believe.
Where are some of you (I'm looking at you, aminorex) getting your estimates from for hardware cost? I (as in: me, small time forum user with a cc) can get 1 TH/s for 1100 USD through Antminer. And I hope you don't believe for one second a large mining farm operator would pay retail prices like that, right?
1I'm not being frivolous here if I say that I think a realistic estimate for a
large scale mining operation should be assumed to operate between factor 0.5 to 1 of that value (keep in in mind, Antminer sells a more or less complete product, a large miner will order the chips and do everything else himself), so my estimate would be
[$550, $1100]/TH/s1And please don't respond with "those are not energy efficient enough"... the large farms are precisely set up in such a way to minimize the energy costs, so their calculation will be to find the sweet spot between lowest possible hardware cost operating under heavily reduced energy costs.
but hey, i'm a hacker (the good kind), not a financial analyst 
