Let's get the block party started!  First person to find a block today gets a 2BTC Hump Day Bonus!  You will also be entered into the diff change drawing where you could win an additional 1BTC.

Kettle and cooker?  Order out!  Use those circuits for mining!

Thanks --Encrypted--! I hadn't seen that explorer before... added to my list .

OK... if I'm reading it properly, it looks like the second transaction is trying to spend the unconfirmed output from the first one.

First TX:

https://live.blockcypher.com/btc/tx/6ec890618a687f6fc09c4b9cdbda5bb1d18cc0a86bda09abed9a5db0277433bb/

Second TX:

https://live.blockcypher.com/btc/tx/873a0d1156da19572785f2b576c92876fe88d91b3d0ab082c9de3236af42a3e0/

Look at the output from the first transaction... 0.025 to 1L9P and 0.018 to 1ABP.  That 0.018 output is used as input in the second transaction.

So, until that first transaction confirms (good luck), then that second one can't.

I can't find that transaction anywhere.  It's not on any block explorer, nor is it available on my own coin daemon that runs with txindex=1.  What wallet are you using to create and send these transactions?

To answer the OP's purely speculative question: yes, if all mining were to cease, BTC would be dead in the water.  You could create as many transactions as you wanted, but since nobody was mining them, they would never be included in blocks and hence, never confirmed.


No, one of the big selling points is that you can send BTC anywhere in the world very quickly, with very little cost to you.

Real world example.  I just sent nearly 10BTC to someone in another country in three separate transactions.  It cost me a grand total of $0.14 to do so.  Good luck doing that with Western Union, PayPal, or any other money transfer service.

There are plenty of online calculators that provide you with this information.  If you'd like to calculate it yourself, a good formula to use is:


So, if we use an Antminer S7 as an example (4.75T):


Yup, the S7 expects to take just over five and a half years to find a block at the current difficulty.

createrawtransaction requires you to manually enter the inputs and outputs.  You need to know the unspent transaction outputs you wish to use as your inputs.

signrawtransaction does exactly what it sounds like: sign the raw transaction you just created

sendrawtransaction: broadcasts the signed transaction you created

sendtoaddress: does all the stuff of createrawtransaction, signrawtransaction and sendrawtransaction.  It doesn't require you to know all of your UTXO.  All of that is managed behind the scenes.  It'll pick the inputs and create a change address for you.  All you have to input is the address to which you wish to send the coins, and how many coins you wish to send.

Best Share: 0.  Looks like they still haven't bothered to address that little quirk.

Your hash rate is too low to even register.  CPU mining has been dead for years.  At that hash rate, you'd expect to find a diff 1 share every 2.75 minutes.  The expected earnings, at current difficulty, is 0.00000007BTC a day.  That translates to $0.01 a year.

A real-world example is p2pool.  The block finder receives a 0.5% reward, meaning the remaining miners receive 99.5%.

OP just created another transaction that is huge, but has virtually no fees attached to it.  He's now got 30BTC in transactions that are extremely unlikely to ever get confirmed.

Weekend promo... everyone who finds a block this weekend gets 1BTC.  Hitting a block also gets your name added to the list for the diff change promo, where you could win another 1BTC.

Good luck!

I think it's a misuse of the word efficiency.  To truly gain more efficiency, then you'll have to follow Phil's advice: find a way to lower the input voltage.  Some server PSUs will allow you to modify the output voltage.

If you're just looking to use less power, then simply under clock the miner.  You can change the frequency directly in the UI (CGMiner Configuration).  Range is from 100 - 500, with 500 as default.

Agreed, Phil.  That's why I asked .

It may have already been asked (that was sarcasm, by the way)... when are we going to see a working new miner that we can purchase?

Is there any consideration for upgrade path for existing mining hardware - i.e. board replacement?

I'm not advocating the banning of rentals.  In fact, I have spent way more coin (think nearly 100BTC) on rentals than I probably should have.  Personally, I've seen no indication of bad actors as I've hit 6 blocks with rentals (4 on my own pool, 2 on pools previous to my pool starting).

My only point was that if I'm a bad actor, the rental services are where I'd hide because tracking me would be extremely difficult.

OK... thousands of years is a bit of an exaggeration... 180GH expects to solve a block after 147 years at current diff

Renting is a double edged sword.  I know that I've certainly hit blocks from rentals, as have many others.  The problem is that the rental sites hide the nefarious actions of the malicious actors.  You cannot know whether the hash you have rented is truly ever going to solve a block for you.

Let's take the classic block withholding attack as an example.  If I'm a bad actor and I try to point my gear at a regular pool, I might get away with it for a while, but chances are exceptionally good I will be found.  If I instead point my gear to NH, I am hidden.  Since my bad gear is combined with good gear, and my gear can constantly be pointed to different targets, there's no way to ever track me.  It's the perfect hiding place for me, and I'm absolutely guaranteed to get paid.

NH/WH is very easy to identify: their IP addresses.  To ban them would simply be to blacklist their IP addresses at the firewall.

You take a chance with any rental gear no matter from which site you purchase it.  You as the person renting have absolutely no control over the underlying hardware, and both the rental sites, and the gear owners are getting paid no matter whether the gear can solve a block or not.  A caveat here is that MRR will indeed refund the customer should the gear rented not perform as advertised.

I don't know that it's coy, but rather that every rental site hides and protects bad actors by the very nature of the way the rental sites work.