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Let us say you had one legit $20 and one quite good photocopy of the same $20. If someone were to try to spend both the real bill and the imitation one, someone that took the problem of looking at both of the bills' consecutive numbers would observe that they were the same number, and consequently one of them needed 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 established by Satoshi Nakamoto, and is an issue of controversy, as some miners think 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 verifies transactions will receive paid off.
1MB of transactions can theoretically be as little 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 meet two conditions. One is a matter of effort, one is a matter of luck.
2) You must be the first miner to arrive at the right answer to a numeric problem. This process is also known as a proof of work.
The fantastic news: No advanced math or computation is involved. You may have heard that miners are solving challenging mathematical problems--that is not true in any way. What they're 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 hash.
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The bad news: Since it's guesswork, you need a good deal of computing power in important source order to get there . To mine successfully, you need to get a higher"hash rate," 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 can mine with your mining rig's hash pace, the site Cryptocompare offers a 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--buy individual graphics cards (GPUs) as a cheap method to cobble together mining operations. The photograph below is a makeshift, home-made mining machine. The cards are such rectangular cubes with whirring circles. Note the sandwich twist-ties holding the graphics 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 sheet of paper and seal it in an envelope. My friends don't need to guess the exact number, they just must be the very first person to guess any number that is less than or equal to this number I'm thinking of.
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Let's say I am thinking about 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 theoretically arrived at workable answers, since 16<19 and 12<19. There is 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 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%--that miner to honour. Normally, it is the miner that has done the most work, i.e.
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The number preceding has 64 digits. Easy enough to understand so far. As you likely noticed, that number consists not just of numbers, but also letters of this alphabet. Why is that
In order to understand what these letters are doing in the middle of numbers, let's 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.