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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 real bill and the imitation one, someone who took the trouble of looking at both of the bills' consecutive numbers would observe that they were exactly the exact same number, and consequently one of them had to be false.

This isn't a great analogy--we'll explain in more detail below. .

Once a miner has confirmed 1 MB (megabyte) worthiness of Bitcoin transactions, they are entitled 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 supports transactions will receive paid off.

1MB of transactions can theoretically be as little as 1 transaction (though this is not at all common) or several 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 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 difficult 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")  that is less than or equal to the target hash.

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The bad news: Because it's guesswork, you need a lot of computing power in order to get there . To mine successfully, you need to have a higher"hash speed," that is quantified in terms of megahashes per second (MH/s), gigahashes per second (GH/s), and terahashes per reference second (TH/s).

If you want to estimate 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 into 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 cards are those 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 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 first person to guess 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 of the number 19. If Friend A guesses 21they shed because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they've both technically came 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 occur frequently, but at 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 decide by a simple majority--51 percent --which miner to honour. Typically, it's the miner that has done the most work, i.e.

The losing block then becomes an"orphan block." .

Now imagine I present the"guess what number I am thinking of" question, but I am not asking only three friends, and I am 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 quite difficult to guess the ideal answer.

## The Buzz on How Bitcoins Are Made

The number above has click here for more 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 these letters are doing in the center of numbers, let us unpack the term"hexadecimal."

As you know, we use the"decimal" system, which means it is base 10. This in turn means that every digit has 10 possibilities, 0-9.