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Let's say you had one legit $20 and one really good photocopy of the same $20. If someone were to try to spend both the real bill and the fake one, someone that took the problem of looking at either of the invoices' serial numbers would see that they were exactly the exact same number, and thus one of them had to be false.
That isn't a perfect analogy--we'll explain in more detail below. .
Once a miner has confirmed 1 MB (megabyte) worthiness of Bitcoin transactions, they are entitled to win the 12.5 BTC. The 1 MB limit was set by Satoshi Nakamoto, and is a matter of controversy, as some miners think the block size ought to be increased to accommodate more data.
Note that I said that verifying 1 MB worth of transactions makes a miner eligible to earn Bitcoin--not everyone who supports transactions will get paid off.
1MB of transactions can technically be little as 1 transaction (although this is not at all common) or several thousand. It depends on how much information the transactions take up.
In order to earn Bitcoin, you need to meet two conditions. One is a matter of work, one is a matter of luck.
2) You have to be the first miner to arrive at the right answer to some numeric problem. This process is also known as an evidence of work.
The good news: No advanced math or computation is involved. You may have heard that miners are solving difficult mathematical problems--that is not true in any way. What they're actually doing is trying to be the first miner to come up with a 64-digit hexadecimal number (a"hash") which is less than or equal to the hash.
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The bad news: Because it's guesswork, you need a good deal of computing power in order to get there first. To mine successfully, you need to have a higher"hash speed," that is quantified in terms of megahashes per second (MH/s), gigahashes per second (GH/s), and terahashes per second (TH/s).
If you want to estimate how much Bitcoin you can mine along with your mining rig's hash pace, the site Cryptocompare offers a very helpful calculator.
Either a GPU (graphics processing unit) miner or an application-specific integrated circuit (ASIC) miner. These can run from $500 into the tens of thousands. Some miners--especially Ethereum miners--purchase individual graphics cards (GPUs) as a low-cost method to cobble together mining operations. The photograph below is a makeshift, home-made mining machine. The cards are those rectangular blocks with whirring circles. Note the sandwich twist-ties holding the graphics cards into the metal read here rod.
Example: I tell three friends I'm thinking about a number between 1 and 100, and that I write that number on a piece of paper and seal it in an envelope. My friends don't need to guess the exact number, they simply have to be the first person to figure any number that is less than or equal to this number I am thinking of.
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Let's say I'm thinking of the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they've both technically came at viable answers, since 16<19 and 12<19. There is no"extra credit" for Friend B, even though B's answer was nearer to the target answer of 19. .
In Bitcoin conditions, simultaneous answers occur frequently, but in the end of the day there can only be one winning answer. When multiple simultaneous answers are presented that are equal to or less than the target number, the Bitcoin network will decide by a simple majority--51%--which miner to honour. Typically, it is the miner who has done the work, i.e.
The losing block then becomes an"orphan block." .
Now imagine that I pose the"guess what number I'm thinking of" question, however I am not asking only 3 friends, and I am not thinking of a number between 1 and 100. Rather, I'm asking millions of would-be miners and I'm thinking of a 64-digit hexadecimal number. Now you see that it's going to be quite difficult to guess the read the article ideal answer.
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The number above has 64 digits. Easy enough to understand so far. As you probably noticed, that number consists not just of numbers, but also letters of this alphabet. Why is that
In order to understand these letters are doing in the middle of numbers, let's unpack the term"hexadecimal."
As you know, we utilize the"decimal" system, which means it is base 10. This in turn means that each and every digit has 10 chances, 0-9.