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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 try to spend both the true bill and the fake one, someone that took the problem of looking at either of the bills' consecutive numbers would see that they were the exact same number, and thus one of them had to be false.
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 entitled 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 ought to be increased to accommodate more data.
Note that I said 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 theoretically be as little as 1 transaction (although 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 perfect answer to a 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 difficult mathematical problems--that's not true in any way. What they're 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 target hash.
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The bad news: Because it's guesswork, you need a good deal of computing power in order to get there . To mine successfully, you need to get a high"hash rate," that is quantified 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 along with your mining rig's hash rate, the site Cryptocompare provides a helpful calculator.
Either a GPU (graphics processing unit) miner or an application-specific integrated circuit (ASIC) miner. These can run from $500 into 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 photograph below is a makeshift, home-made mining machine. The graphics cards are such rectangular cubes with whirring circles. Note the sandwich twist-ties holding the graphics cards to the metal pole.
Case in point : I tell three friends I'm thinking of a 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 exact number, they just must be the very first person to figure any number that's less than or equal to this number I am thinking of.
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Let us say I am thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both technically came at workable answers, because 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 at the end of the day there can only be one winning answer. When multiple simultaneous answers are presented that are equivalent 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.
The losing block then becomes an"orphan block" .
Now imagine that I pose the"figure what number I am thinking of" question, but I'm not asking you can look here only 3 friends, and I'm not thinking of a number between 1 and 100. Rather, I'm asking millions of prospective miners and I am thinking about a 64-digit hexadecimal number. Now you see that it's going to be extremely hard to guess the ideal 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 only of numbers, but also letters of this alphabet. Why is that
In order to go to this site understand what these letters are doing in the middle of numbers, let us unpack the term"hexadecimal."
As you know, we utilize the"decimal" system, which means it's base 10. This in turn means that each and every digit has 10 chances, 0-9.