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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 attempt to spend both the true bill and the fake one, someone that took the problem of looking at both of the invoices' consecutive numbers would see that they had been the same number, and thus one of them had to be fictitious.
That isn't a great analogy--we'll explain in more detail below. .
Once a miner has confirmed 1 MB (megabyte) worth of Bitcoin transactions, they are eligible to win the 12.5 BTC. The 1 MB limit was set by Satoshi Nakamoto, and can be a matter of controversy, as some miners think the block size should be increased to accommodate more data.
Note that I stated that verifying 1 MB worth of transactions makes a miner eligible to earn Bitcoin--not everyone who verifies transactions will receive paid out.
1MB of transactions can technically be small as 1 transaction (though this is not in any way common) or a few 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 effort, one is a matter of luck.
2) You have to be the first miner to reach the right answer to a numeric problem. This practice is also known as an evidence of work.
The fantastic news: No advanced math or computation is involved. You might have discovered that miners are solving difficult mathematical problems--that is not true in any way. What they're 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 target hash.
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The bad news: Since it's guesswork, you need a lot of computing power in order to get there . To mine , you need to get a high"hash speed," which is measured 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 with your mining rig's hash rate, 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 to the tens of thousands. Some miners--especially Ethereum miners--purchase individual graphics cards (GPUs) as a low-cost way to cobble together mining operations. The photograph below is a makeshift, high-tech mining machine. The cards are those rectangular cubes with whirring circles. Note the sandwich twist-ties holding the pictures cards to the metal rod.
Case in point I tell three friends that I'm thinking about a number between 1 and 100, and I write that number on a piece find out 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 guess any number that is less than or equal to this number I'm thinking of.
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Let us say I'm thinking about the number 19. If Friend A guesses 21, they shed because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they have both theoretically arrived at viable answers, because 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 at the end of the day there can only be one winning answer. When multiple simultaneous answers are presented which can be equal to or less than the target number, the Bitcoin network will determine by a simple majority--51 percent --which miner to honour. Typically, it's the miner who has done the work, i.e.
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The number above has 64 digits. Easy enough to understand up to now. 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 us unpack the word"hexadecimal."
As you knowwe use the"decimal" system, which means it's base 10. This in turn means that every digit has 10 possibilities, 0-9.