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How much hashrate power would I require to surely mine one bitcoin block per day?

Thanks.

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There's no such thing as "sure": no matter how much hash power you have, there will always be some nonzero probability of mining no blocks in a day. How small do you want that probability to be? Also, your title talks about mining one coin but the body is about mining one block; please clarify. –  Nate Eldredge Jul 27 at 2:28
    
You can play around with tools like this one bitcoinx.com/profit But as Nate said there is nothing sure. It are just estimations. –  Jan Moritz Lindemann Jul 27 at 3:12
    
@NateEldredge I would like the probability of not mining a single block per day to be very low. Sorry the confusion, I was going to ask about mining 1 bitcoin, but then I remembered that we can only mine block by block. This is all a sudden interest of mine, I'm not quite well familiar with bitcoin terminology and inner workings. –  Fábio Antunes Jul 27 at 3:25
    
Nowadays almost all miners use mining pools. Look at this en.bitcoin.it/wiki/Pooled_mining –  Jan Moritz Lindemann Jul 27 at 4:38

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up vote 5 down vote accepted

Divide this number by the number of seconds in a day (86400) to get the required number of hashes per second to solve one block per day on average. You might get more than one block on some days and no blocks on others. It's random.

Currently, you'd need about 931 TH/s, which is a ridiculous amount of mining power.

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Given this number, one can work out the hash rate needed to have, say, a 99 percent probability to get at least one block per day. Look up the Poisson distribution. –  Nate Eldredge Jul 27 at 5:59
    
At today's hashrate and prices, an investment of 2,223 (about $836,300 or 1467 BTC worth of) S3 miners would net you a block a day. All you need is ~16 cubic meters to house them, and 756 kilowatts of energy (more of each, for cooling, etc.). Oh, and PSUs. –  Tim S. Aug 12 at 18:41

About 40 TeraHash will make 1 btc a day About 66 Thousands bux worth of miners. And 400Amp power service. Maybe a lil more.

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"About 66 Thousands bux worth of miners" I like the way you show the things. –  Jan Moritz Lindemann Jul 27 at 6:31
    
Now you only need to multiply by 25 to get the numbers for getting, on average, one block per day. To be 100% sure of always succeeding with at least one block per day, you'd need to be the only miner around, though. –  pyramids Jul 27 at 11:19

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