# Little Known Facts About Help Wikipedia.

Let us 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 problem of looking at either of the invoices' consecutive numbers would see that they had been exactly the same number, and thus one of them needed to be false.

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

Once a miner has confirmed 1 MB (megabyte) worthiness of Bitcoin transactions, they are eligible 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 ought to be increased to accommodate more data.

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

1MB of transactions can technically be small as 1 transaction (although this is not in any way common) or several 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 work, one is a matter of luck.

2) You have to be the first miner to arrive at the right answer to some 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 at all. What they're actually doing is trying to be the first miner to come up with a 64-digit hexadecimal number (a"hash") that is less than or equivalent to the hash.

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The bad news: Because it's guesswork, you need a lot of computing power in order to get there first. To mine , you need to get a high"hash rate," which 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 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--particularly Ethereum miners--purchase individual graphics cards (GPUs) as a cheap method to cobble together mining operations. The photograph below is a makeshift, high-tech mining machine. The cards are such rectangular blocks with whirring circles. Note the sandwich twist-ties holding the pictures cards into the metal pole.

Case in point I tell three friends that 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 exact number, they just must be the very first person to figure any number that is less than or equal to the number I am thinking of.

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Let's say I'm thinking of 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 viable 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 happen frequently, but at 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 decide by a simple majority--51%--which miner to honour. Normally, it is the miner who has done the work, i.e.

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The number preceding 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 the alphabet. Why is that

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

As you knowwe utilize the"decimal" system, which means it's base 10. This in turn means that every digit has 10 possibilities, 0-9.

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