# The Basic Principles Of Help Wikipedia

Let's say you had one legit \$20 and one really good photocopy of that same \$20. If someone were to attempt to spend both the true bill and the imitation one, someone that took the problem of looking at either of those invoices' consecutive numbers would observe that they had been the same number, and thus one of them had to be false.

This 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 entitled to win the 12.5 BTC. The 1 MB limit was established by Satoshi Nakamoto, and can be a matter of controversy, as some miners believe the block size should be increased to accommodate more data.

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

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 information the transactions consume.

In order to earn Bitcoin, you need to meet two conditions. One is a matter of effort, one is a matter of luck.

2) You have to be the first miner to reach the right answer to a numeric problem. This practice is also known as an evidence of work.

The fantastic news: No advanced math or computation is involved. You may have heard that miners are solving challenging mathematical problems--that's 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")  which is less than or equivalent to the hash.

The bad news: Since it is guesswork, you need a good deal of computing power in order to get there first. To mine , you need to get a high"hash speed," which is quantified in navigate here 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 mine with your mining rig's hash rate, the website Cryptocompare provides a very 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--buy individual graphics cards (GPUs) as a low-cost way 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 to the metal rod.

ExampleI tell three friends I'm thinking about a number between 1 and 100, and that I write that number on a piece of paper and seal it in an envelope. My friends don't need 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'm thinking of.

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Let's say I am thinking about the number 19. If Friend A guesses 21, they shed because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they have 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 closer to the target answer of 19. .

In Bitcoin terms, simultaneous answers happen frequently, but in the see this site 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 determine by a simple majority--51%--that miner to honour. Normally, 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 only 3 friends, and I am not thinking of a number between 1 and 100. Rather, I am asking millions of prospective miners and I'm thinking of a 64-digit hexadecimal number. Now you see that it's going to be quite difficult to guess the ideal answer.

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The number preceding has 64 digits. Easy enough to understand so far. As you likely noticed, that number consists not just of numbers, but also letters of this alphabet. Why is that

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

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