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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 attempt to spend both the true bill and the imitation one, someone who took the trouble of looking at either of those bills' consecutive numbers would see that they were exactly the same number, and consequently one of them needed to be fictitious.
This isn't a perfect analogy--we will explain in more detail below. .
Once a miner has verified 1 MB (megabyte) worthiness of Bitcoin transactions, they are eligible to win the 12.5 BTC. The 1 MB limit was established by Satoshi Nakamoto, and can be a matter of controversy, as some miners believe the block size should be increased to accommodate more information.
Note that I said that verifying 1 MB value of transactions makes a miner eligible to earn Bitcoin--not everyone who verifies transactions will get paid off.
1MB of transactions can technically be small as 1 transaction (though this is not at all common) or a few thousand. It depends on how much data the transactions take up.
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 a numeric problem. This process is also known as an evidence of work.
The fantastic news: No advanced math or computation is involved. You might have heard that miners are solving difficult mathematical problems--that's not true at all. 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 equivalent to the 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 , you need to get a high"hash rate," which 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 could mine along 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--particularly Ethereum miners--purchase look at these guys individual graphics cards (GPUs) as a low-cost method to cobble together mining operations. The photograph 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 metal pole.
ExampleI tell three friends that I'm thinking of a number between 1 and 100, and 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 first person to guess any number that is less than or equal to the number I'm thinking of.
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Let us say I am thinking about the number 19. If Friend A guesses 21they lose because 21>19. If Friend B supposes 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 closer to the goal answer of 19. .
In Bitcoin conditions, 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 determine by a simple majority--51%--which miner to honour. Typically, it's the miner who has done the work, i.e.
The losing block then becomes an"orphan block." .
Now imagine I pose the"figure what number I am thinking of" question, however I'm not asking just three friends, and I am not thinking of a number between 1 and 100. Instead, I'm asking millions of would-be miners and I am thinking about a 64-digit hexadecimal number. Now you see that it's going to be quite hard to guess the ideal answer.
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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 the alphabet. Why is that
In order to understand what these letters are doing in the middle of numbers, let's unpack the term"hexadecimal."
As you knowwe use the"decimal" system, which means it's base 10. This in turn means that each and every digit has 10 chances, 0-9.