# Some Ideas on Bitcoin Mining Code You Should Know

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

This isn't a great 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 set 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 worth of transactions makes a miner qualified to earn Bitcoin--not everyone who verifies transactions will receive paid out.

1MB of transactions can theoretically be as small as 1 transaction (though this is not at all common) or a few 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 effort, one is a matter of luck.

2) You must be the first miner to reach the perfect 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 might have discovered that miners are solving difficult mathematical problems--that's not true in any way. 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 . To mine successfully, you need to have a higher"hash speed," that is quantified 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 with your mining rig's hash rate, the website 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 cheap way to cobble together mining operations. The photo below is a makeshift, high-tech mining machine. The graphics cards are such 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 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 exact number, they just have to be the very first person to figure any number that's less than or equal to this number I am thinking of.

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Let us say I am thinking about the number 19. If Friend A guesses 21they lose 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 is 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%--that 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 that I present the"guess what number I am thinking of" question, but I'm not asking only three friends, and I am not thinking of a number between 1 and 100. Rather, I am 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 right answer.

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The number above has 64 digits. Easy enough to understand up to now. As you probably noticed, that try this web-site 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 is base 10. This in turn means that each and every digit has 10 chances, 0-9.