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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 try to spend both the true bill and the imitation one, someone that took the problem of looking at either of the bills' consecutive numbers would see that they were the same number, and consequently one of them needed to be fictitious.
This isn't a great analogy--we'll 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 is an issue of controversy, as some miners think the block size ought to be increased to accommodate more information.
Note that I said that verifying 1 MB value 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 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 effort, one is a matter of luck.
2) You have to be the first miner to arrive at the perfect 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 may have discovered that miners are solving challenging mathematical problems--that's not true at all. What they are actually doing is trying to be the first miner to think of a 64-digit hexadecimal number (a"hash") which is less than or equivalent to the hash.
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The bad news: Since it is guesswork, you need a lot of computing power in order to get there first. To mine , you need to have 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 can mine with your mining rig's hash pace, the site Cryptocompare provides a very 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--buy individual graphics cards (GPUs) as a low-cost method to cobble together mining operations. The photo below is a makeshift, home-made mining machine. The cards are those rectangular cubes with whirring circles. Note the sandwich twist-ties holding the graphics cards to the more helpful hints metal rod.
Example: 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 have to guess the specific number, they simply have to be the very first person to figure any number that is less than or equal to this number I'm thinking of.
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Let's say I'm thinking of the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B guesses 16 and Friend C supposes 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 nearer to the target answer of 19. .
In Bitcoin terms, simultaneous answers occur frequently, but in 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%--that miner to honour. Normally, it is the miner that has done the most work, i.e.
The losing block then becomes an"orphan block" .
Now imagine that I pose the"figure what number I'm thinking of" question, however I'm 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'm thinking about 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 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 the alphabet. Why is that
In order to understand what these letters are doing in the middle of numbers, let us unpack the term"hexadecimal."
As you knowwe utilize the"decimal" system, which means it's base 10. This in turn means that each and every digit has 10 chances, 0-9.