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Let's say you had one legit $20 and one quite 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 those invoices' serial numbers would see that they were the exact same number, and consequently one of them needed to be fictitious.
This isn't a great analogy--we will 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 an issue of controversy, as some miners think the block size should be increased to accommodate more data.
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 technically be small 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 fulfill two conditions. One is a matter of work, one is a matter of luck.
2) You have to be the first miner to arrive at the perfect answer to a numeric issue. This process is also known as an evidence of work.
The good 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 actually doing is trying to be the first miner to think of a 64-digit hexadecimal number (a"hash") that is less than or equal to the hash.
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The bad news: Because it is guesswork, you need a lot of computing power in order to get there . To mine successfully, you need to have a high"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 how much Bitcoin you could mine with your mining rig's hash rate, the site Cryptocompare offers 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--especially Ethereum miners--buy individual graphics cards (GPUs) as a cheap way to cobble together mining operations. The photo below is a makeshift, high-tech mining machine. The graphics cards are such rectangular blocks with whirring circles. Note the sandwich twist-ties holding the graphics review cards into the metal rod.
Case in point : I tell three friends try this website that 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 need to guess the specific number, they just have to be the first person to figure any number that is less than or equal to this number I'm thinking of.
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Let us say I am thinking about the number 19. If Friend A guesses 21they shed because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they have 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 target answer of 19. .
In Bitcoin conditions, simultaneous answers happen frequently, but at the end of the day there can only be Full Article one winning answer. When multiple simultaneous answers are presented which can be equivalent to or less than the target number, the Bitcoin network will determine by a simple majority--51%--that miner to honour. Normally, it's the miner that has done the most work, i.e.
The losing block then becomes an"orphan block." .
Now imagine I pose the"guess what number I'm thinking of" question, but I am not asking only three friends, and I'm not thinking of a number between 1 and 100. Rather, I am asking millions of prospective miners and I am thinking of a 64-digit hexadecimal number. Now you see that it's going to be extremely difficult to guess the right answer.
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The number preceding has 64 digits. Easy enough to understand so far. As you probably 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 us unpack the term"hexadecimal."
As you knowwe use the"decimal" system, which means it is base 10. This in turn means that each and every digit has 10 chances, 0-9.