# The 10-Second Trick For Help Wikipedia

Let's say you had one legit \$20 and one quite good photocopy of that same \$20. If someone were to attempt to spend both the true bill and the imitation one, someone who took the trouble of looking at both of those bills' serial numbers would observe that they had been the exact same number, and consequently one of them had to be false.

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

Once a miner has verified 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 is a matter of controversy, as some miners believe the block size should be increased to accommodate more information.

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

1MB of transactions can technically be little as 1 transaction (though 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 fulfill two conditions. One is a matter of effort, one is a matter of luck.

2) You have to be the first miner to arrive at the perfect answer to some numeric problem. This practice is also known as an evidence of work.

The good news: No advanced math or computation is involved. You might have heard that miners are solving difficult mathematical problems--that is not true at all. What they are 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 target hash.

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The bad news: Since it is guesswork, you need a lot of computing power in order to get there first. To mine successfully, you need to have a high"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 how much Bitcoin you can mine with your mining rig's hash pace, the site Cryptocompare offers a very 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 method to cobble together mining operations.  The photo below is a makeshift, home-made mining machine.  The my response graphics cards are such rectangular cubes with whirring circles.  Note the sandwich twist-ties holding the pictures cards to the metal pole.

Example: I tell three friends that I'm thinking about 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 specific number, they just have to be the first person to figure any number that's less than or equal to the number I'm thinking of.

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Let us say I am thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both technically came 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 happen 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 view website decide by a simple majority--51%--which miner to honour. Normally, it is the miner who has done the work, i.e.

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

Now imagine I present the"guess what number I am thinking of" question, however I'm not asking only three friends, and I'm not thinking of a number between 1 and 100. Instead, I'm asking millions of prospective miners and I'm thinking about a 64-digit hexadecimal number. Now you see that it's going to be quite difficult to guess the right answer.

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

In order to understand these letters are doing in the middle 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 click here for info each and every digit has 10 possibilities, 0-9.