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Let us say you had one legit $20 and one really good photocopy of the 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 either of those invoices' serial numbers would observe that they were exactly the same number, and thus one of them needed to be false.

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 set 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 said that verifying 1 MB worth of transactions makes a miner eligible to earn Bitcoin--not everyone who verifies 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 consume.

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 must be the first miner to arrive at the right answer to a 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 heard that miners are solving challenging mathematical problems--that's not true in any way. What they are actually doing is trying to be the first miner to think of a 64-digit hexadecimal number (a"hash") which is less than or equal to the target hash.

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The bad news: Since it's guesswork, you need a lot of computing power in order to get there . To mine , you need to get a higher"hash speed," 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 just how much Bitcoin you can mine along with your mining rig's hash rate, the site Cryptocompare offers a helpful calculator.

Either a GPU (graphics processing unit) miner or an application-specific integrated circuit (ASIC) navigate to this site miner. These can run from $500 to the tens of thousands. Some miners--especially Ethereum miners--buy individual graphics cards (GPUs) as a low-cost method 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 pictures cards into the metal pole.

Example: 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 exact number, they simply must be the very first person to guess any number that's less than or equal to the number I am thinking of.

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Let us say I'm thinking about 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, because 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 happen 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 decide by a simple majority--51 percent --that miner to honour. Typically, it is the miner who has done the work, i.e.

The losing block then becomes an"orphan see it here block" .

Now imagine I present the"guess what number I'm thinking of" question, but I am not asking just 3 friends, and I am not thinking of a number between 1 and 100. Rather, I am asking millions of would-be miners and I am thinking of a 64-digit hexadecimal number. Now you see that it is going to be extremely hard to guess the ideal answer. browse this site

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The number above has 64 digits. Easy enough to understand so far. As you probably 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 center of numbers, let's unpack the word"hexadecimal."

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