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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 who took the problem of looking at both of the invoices' consecutive numbers would observe that they were the exact same number, and consequently one of them had to be fictitious.

That isn't a perfect analogy--we will explain in more detail below. .

Once a miner has confirmed 1 MB (megabyte) worth of Bitcoin transactions, they are eligible to win the 12.5 BTC. The 1 MB limit was established by Satoshi Nakamoto, and is a matter of controversy, as some miners think 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 receive paid off.

1MB of transactions can theoretically be as small as 1 transaction (although this is not in any way common) or several thousand. It depends on how much information 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 reach the perfect answer to some numeric issue. This process is also known as a proof of work.

The fantastic news: No advanced math or computation is involved. You may 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 target 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 go to this website higher"hash speed," 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 just how much Bitcoin you could find out this here mine along with your mining rig's hash rate, the website 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--especially Ethereum miners--purchase individual graphics cards (GPUs) as a cheap way to cobble together mining operations. The photo below is a makeshift, home-made mining machine. The cards are those rectangular blocks with whirring circles. Note the sandwich twist-ties holding the graphics cards to the metal pole.

Example: I tell three friends that I'm thinking of a number between 1 and 100, and I write that number on a sheet of paper and seal it in an envelope. My friends don't need to guess the specific number, they simply read this post here must be the first person to guess any number that is less than or equal to the number I am thinking of.

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Let us say I'm thinking of the number 19. If Friend A guesses 21they shed because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they have both theoretically arrived at workable answers, since 16<19 and 12<19. There's no"extra credit" for Friend B, even though B's answer was closer 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 --that miner to honour. Typically, it is the miner that has done the work, i.e.

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

Now imagine I present the"guess what number I'm thinking of" question, however I am not asking just three friends, and I'm not thinking of a number between 1 and 100. Instead, I'm asking millions of prospective miners and I am thinking of 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 up to now. As you likely noticed, that number consists not only of numbers, but also letters of this 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 is base 10. This in turn means that every digit has 10 possibilities, 0-9.