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Let's say you had one legit $20 and one really good photocopy of that same $20. If someone were to attempt to spend both the real bill and the fake one, someone who took the trouble of looking at either of those bills' consecutive numbers would see that they had been the exact same number, and consequently one of them had to be false.
That isn't a perfect analogy--we will explain in more detail below. .
Once a miner has confirmed 1 MB (megabyte) worthiness of Bitcoin transactions, they are eligible to win the 12.5 BTC. The 1 MB limit was set by Satoshi Nakamoto, and is an issue of controversy, as some miners think the block size ought to 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 supports transactions will get paid out.
1MB of transactions can theoretically be as small as 1 transaction (though this is not in any way common) or a few thousand. It depends on how much information the transactions consume.
In order to earn Bitcoin, you need to fulfill two conditions. One is a matter of work, one is a matter of luck.
2) You have to be the first miner to reach the perfect answer to some numeric issue. This practice is also known as an evidence of work.
The good news: No advanced math or computation is involved. You might have heard that miners are solving challenging mathematical problems--that is not true at all. 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 equivalent 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," that 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 pace, the site Cryptocompare provides 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 method to cobble together mining operations. The photograph below is a makeshift, high-tech mining machine. The graphics cards are such rectangular cubes with whirring circles. Note the sandwich twist-ties holding the pictures cards into the metal rod.
Case in point I tell three friends that I'm thinking of a check 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 have to guess the specific number, they just have to be the first person to guess 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 21they lose because 21>19. If Friend B guesses 16 and Friend C supposes 12, then they've both technically came at viable answers, since 16<19 and 12<19. There's no"extra credit" for Friend B, even though B's answer was nearer to the goal answer of 19. .
In Bitcoin terms, simultaneous answers happen frequently, but in blog 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 decide by a simple majority--51 percent --that miner to honour. Typically, it is the miner that has done the work, i.e.
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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 center of numbers, let's unpack the term"hexadecimal."
As you knowwe use the"decimal" system, which means it's base 10. This in turn means that each and every digit has 10 possibilities, 0-9.