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For instance, the SHA-256 of this term BUTTERFLY (source) is 8c62ace4f9ef8ccd08ca6fb992a8524bb7dbdc0530654bd254c9da07a660949a (HASH). This seemingly random string of letters and numbers contains three important properties:

Bitcoin mining involves three factors: the cube, the mining difficulty and a random number. Heres how it all comes together:

Imagine our cube consists of the word BUTTERFLY discussed earlier. In fact, the block could contain a listing of recent, unverified transactions, but lets keep it simple. In order for the block to be solved, bitcoin uses a simple test: If the HASH result of the block starts with a certain number of zeros, then the block is considered verified.

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For instance, lets say that we've a mining difficulty of simply two, ie, our HASH must begin with two zeros. .

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The difficulty: BUTTERFLY will return the same HASH, and it doesnt start with two zeros. Thus what we need is the third factor, a random number (known as a NONCE). We take this number, combine it with BUTTERFLY, and HASH again. If it doesnt start with two zeros, we change the number and try again, and because changing one little number changes the whole HASH result, there's absolutely no method to forecast the number well need to address this! .

We repeat this procedure over and over until we find a number that, when combined with BUTTERFLY, provides us a HASH that starts with two zeros. That number is your solution to the block. Here are some attempts:

This arduous procedure of randomly trying to find a number that supplies the solution is the thing that creates bitcoin mining such a computationally expensive procedure, and as more miners join the network, the harder it gets. As of November 2017, a normal home computer working alone, ie, not an application-specific integrated circuit (ASIC) and not part of a cloud mining network, would take 2.7 million years into mine one block. .

This has led to the growth of ASIC computers built particularly for mining and also to an increase in cloud mining.

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CPU mining. In the early days of bitcoin, mining issue was reduced and not a great deal of miners were competing for cubes and rewards. This made it rewarding to utilize your computers own central processing unit (CPU) to mine bitcoin. However, that approach was soon replaced by GPU mining.

GPU mining. A graphics processing unit (GPU) is a powerful processor whose sole purpose is to assist your computers graphics card in rendering 3D graphics. GPUs are not built for executive decisions (such as CPUs) however to be somewhat great labourers, hence GPUs are able to execute over 800 times more instructions in the same amount of time as a CPU.

FPGA mining. Next came mining using field-programmable gate arrays (FPGAs). These significantly outperformed GPUs and CPUs in the mining procedure as FPGAs are processors that can be programmed to perform certain instructions and only those instructions (instead of being repurposed for mining, such as GPUs were).

ASIC mining. Similar to FPGAs, application-specific integrated circuits are processors designed for a particular purpose, in our case mining bitcoin, and nothing else. ASICs for bitcoin were introduced in 2013 and, as of November 2017, they're the best processors available for mining bitcoin and they outperform FPGAs in power consumption. .

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Mining pools. To offset the difficulty of mining a block, miners started organising in pools or cloud mining networks. Whenever a miner in one of these pools simplifies a cube, the reward is shared with everyone in the pool in a ratio representative of how much work you put into the pool (even though you personally never solved the puzzle). .

Cloud mining. Clouds provide potential miners the ability to buy mining rigs in a remote data centre location. There are many obvious More Help advantages, the most obvious beingno electricity expenses, no extra heat and nothing to market when you opt to hang up your digital pickaxe.

Once miners get bitcoin, they are given a digital key to the bitcoin addresses. You can use this electronic key to access and confirm or approve transactions.

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Desktop wallets. Software such as Bitcoin Core lets you send and store bitcoin addresses and also connects to the network to monitor transactions.

Online wallets. Bitcoin keys are saved online by exchange programs such as Coinbase or Circle and can be accessed from anywhere.

Mobile wallets. Apps like Blockchain store and encrypt your bitcoin keys so that you can make payments using your mobile device.

Paper wallets. Some websites provide paper wallet solutions, generating a bit of paper using just two QR codes on it. One code is your public address where you receive bitcoin and the other is your private address you can use for spending.