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Let us 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 either of the bills' serial numbers would see that they were the exact same number, and consequently one of them had to be false.
This isn't a perfect analogy--we will explain in more detail below. .
Once a miner has verified 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 an issue of controversy, as some miners think the block size ought to 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 verifies transactions will receive paid off.
1MB of transactions can theoretically be as small as 1 transaction (though this is not at all common) or several 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 effort, one is a matter of luck.
2) You must be the first miner to reach the perfect answer to some numeric problem. This process is also known as a proof of work.
The good news: No advanced math or computation is involved. You may have heard that miners are solving difficult mathematical problems--that's not true at all. What they are doing is trying to be the first miner to think of a 64-digit hexadecimal number (a"hash") which 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 first. To mine , you need to get a higher"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 along with your mining rig's hash rate, the website Cryptocompare provides a very helpful calculator.
Either 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--particularly Ethereum miners--purchase individual graphics cards (GPUs) as a low-cost way to cobble together mining operations. The photo below is a makeshift, home-made mining machine. The cards are such rectangular blocks with whirring circles. Note the sandwich twist-ties holding the graphics cards into the metal pole.
ExampleI tell three friends I'm thinking of a number between 1 and 100, and that I write that number on a sheet of paper and seal it in an envelope. My friends don't need to guess the exact number, they just must be the first person to guess any number that's less than or equal to this number I am thinking of.
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Let's say I'm thinking about the number 19. If Friend A guesses 21, they shed because 21>19. If Friend B supposes 16 and Friend C guesses 12, then they've both theoretically arrived at workable answers, because 16<19 and 12<19. There is no"extra credit" for Friend B, even though B's answer was closer to the goal answer of 19. .
In Bitcoin conditions, simultaneous answers happen frequently, but at 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 percent --that 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 so far. As you likely noticed, that number consists not only of numbers, but also letters of the alphabet. Why is that
In order to understand what these letters are doing in the center of numbers, let's unpack the word"hexadecimal."
As you know, we use the"decimal" system, which means it is base 10. This in turn means that each and every digit has 10 chances, 0-9.