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Let us say you had one legit $20 and one really good photocopy of that same $20. If someone were to try to spend both the real bill and the imitation one, someone who took the trouble of looking at both of those invoices' serial numbers would observe that they were the same number, and thus one of them needed to be fictitious.
This isn't a great analogy--we will explain in more detail below. .
Once a miner has confirmed 1 MB (megabyte) worth 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 believe the block size should be increased to accommodate more information.
Note that I stated that verifying 1 MB worth of transactions makes a miner qualified to earn Bitcoin--not everyone who supports transactions will get paid out.
1MB of transactions can theoretically be as little as 1 transaction (though this is not at all common) or several thousand. It depends on how much data the transactions consume.
In order to earn Bitcoin, you need to fulfill two conditions. One is a matter of effort, one is a matter of luck.
2) You have to be the first miner to arrive at the right answer to some numeric issue. This practice is also known as a proof of work.
The fantastic news: No advanced math or computation is involved. You might have heard that miners are solving difficult mathematical problems--that is not true at all. What they are actually doing is trying to be the first miner to come up with a 64-digit hexadecimal number (a"hash") that is less than or equal to the hash.
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The bad news: Since 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 high"hash rate," which 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 just how much Bitcoin you could mine along with your mining rig's hash pace, the site Cryptocompare offers a helpful calculator.
Either way 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--particularly Ethereum miners--buy individual graphics cards (GPUs) as a low-cost way to cobble together mining operations. The photograph below is a makeshift, home-made mining machine. The graphics cards are those rectangular blocks with whirring circles. Note the sandwich twist-ties find out here holding the pictures cards into the metal pole.
Example: I tell three friends I'm thinking about a number between 1 and 100, and I write that number on a piece of paper and seal it in an envelope. he said My friends don't need to guess the exact number, they just have to be the very first person to figure any number that's less than or equal to this number I'm thinking of.
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Let's say I am thinking of the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both theoretically arrived at viable answers, since 16<19 and 12<19. There's no"extra credit" for Friend B, even though B's answer was closer to the target answer of 19. .
In Bitcoin terms, simultaneous answers happen frequently, but in the end of the day there can only be one winning answer. When multiple simultaneous answers are presented which can be equivalent to or less than the target number, the Bitcoin network will decide by a simple majority--51 percent --which miner to honour. Typically, it's the miner who has done the most work, i.e.
The losing block then becomes an"orphan block" .
Now imagine I pose the"figure what number I'm thinking of" question, however I am not asking just 3 friends, and I'm not thinking of a number between 1 and 100. Instead, I'm asking millions of prospective miners and I am thinking of a 64-digit hexadecimal number. Now you see that it is going to be extremely difficult to guess the right answer.
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The number preceding has 64 digits. Easy enough to understand so far. As you probably noticed, that number consists not only 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 word"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 possibilities, 0-9.