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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 fake one, someone that took the problem of looking at either of those invoices' consecutive numbers would see that they were exactly the exact same number, and thus one of them needed to be false.

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

Once a miner has confirmed 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 believe the block size should be increased to accommodate more data.

Note that I stated that verifying 1 MB worth of transactions makes a miner qualified to earn Bitcoin--not everyone who supports transactions will get paid out.

1MB of transactions can theoretically be as little as 1 transaction (although this is not at all common) or several thousand. It depends on how much data the transactions take up.

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 must be the first miner to arrive at the perfect answer to some numeric issue. This process is also known as a proof of work.

The good news: No advanced math or computation is involved. You may have discovered 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")  which is less than or equivalent to the hash.

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The bad news: Since it's guesswork, you need a good deal of computing power in order to get there first. To mine , you need to have a high"hash speed," 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 how much Bitcoin you could mine with your mining rig's hash pace, the website Cryptocompare offers a 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--purchase individual graphics cards (GPUs) as a low-cost way to cobble together mining operations.  The photo below is a makeshift, high-tech mining machine.  The graphics cards are those rectangular cubes with whirring circles.  Note the sandwich twist-ties holding the graphics cards into the metal rod.

Case in point I tell three friends I'm thinking about 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 need to guess the specific number, they just must be the very first person to figure any number that's less than or equal to the number I'm thinking of.

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Let's say I am thinking about the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both theoretically arrived at workable answers, because 16<19 and 12<19. There is no"extra credit" for Friend B, even though B's answer was nearer to the goal 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 equivalent 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.

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

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Now imagine I pose the"guess what number I am thinking of" question, but I am not asking just three friends, and I am not thinking of a number between 1 and 100. Rather, 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 ideal answer.

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The number above has 64 digits. Easy enough to understand so far. As you likely noticed, that number consists not only of numbers, but also letters of the browse around these guys alphabet. Why is that

In order to understand these letters are doing in the middle of numbers, let's unpack the term"hexadecimal."

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

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