How long is the service life of a bitcoin miner

1. bitcoin is an electronic currency proced by open source P2P software. Digital currency is a kind of network virtual currency. Bitcoin is also paraphrased as "bitcoin."
bitcoin does not rely on specific currency institutions to issue. It is generated through a large number of calculations of specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction
because more and more people have been g out, less and less people have not been g out, and more and more people have participated in bitcoin mining, it will become more and more difficult. Many of them go directly to the trading platform to buy. I trade on dobby trading platform

3.

Bitcoin is a kind of network virtual currency. Bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system. Assuming that the mining computing power is 100 mhash / s and the total computing power is 4000 ghash / s per day, 3600 bitcoins can be g out every 24 hours

China's computing power has accounted for more than 75% of the world, that is to say, 75% of bitcoin in the world is made in China. How long does it take to dig a bitcoin

bitcoin used to be very good at "digging", which can be done by ordinary computer CPU, and it can automatically "solve problems" by downloading software. But with the rise of currency price, more and more people want to "solve the problem", and the difficulty of mining is also increasing. Now, the amount of computation needed to dig a bitcoin is beyond the reach of ordinary people. Ordinary computers can't afford it

instry insiders said that in 2014, 100 bitcoins were generated from 500000 yuan of electricity charge per day, and the cost of electricity charge alone was 5000 yuan per coin. But now, the same cost has more than doubled, and the electricity cost of each bitcoin is as high as 10000 yuan

in the generation mechanism of bitcoin, mining reward is decreasing. At the beginning of the birth of bitcoin, the miners could get 50 bitcoins for each page of the ledger, and then 25 bitcoins for each page of the ledger, decreasing in turn. It's like digging gold. At first, it's more and less. The time point at which each new reward is reced by half is called half bitcoin proction

assuming that the mining computing power is 100 mhash / s, the total computing power is 4000 ghash / s per day in 2014, and 3600 bitcoins are g out every 24 hours

now, we can understand the difficulty of bitcoin digging in this way, which is equivalent to 100 million dice throwing numbers less than 100 million and 50 million. Whoever throws them first will get the bookkeeping right. At this point, 1050 million is a hash value. The process of throwing dice is called hash collision. The unit of mining power is the number of hash collisions per second

at present, the computing power of bitcoin in the whole network has reached 2.36 billion hash collisions per second, which is equivalent to the number of water droplets in more than 200000 50 meter long standard swimming pools. But even with such a large amount of computing power, it will take about 10 minutes to hit a hash value that meets the requirements

in 2012, bitcoin's output was halved for the first time, and in July 2016, bitcoin's output was halved for the second time. At present, 12.5 bitcoins are awarded for recording one page of account book. The next halving will take place around 2020, and the total number of bitcoins will not increase by 2040, with a total of 21 million

Related videos: how long does it take to dig a bitcoin

4. According to the current estimation of bitcoin computing power, 58T can get about 0.00095352 bitcoins a day, and it takes about 1000 days to get a bitcoin. However, the computing power of bitcoin will be adjusted. At present, the difficulty will increase, which means that the number of digs per day will decrease once every other period of time.

5. Bitcoin is a kind of cryptocurrency based on decentralization, using peer-to-peer network and consensus initiative, open source, and blockchain as the underlying technology. Under normal circumstances, an ordinary home computer can bear up to 1000h / s of computing power. According to the hash collision data of bitcoin 3 million times per second, if it is just an ordinary home computer, even if it is mining 24 hours a day, it can dig up to 0.0018 bitcoins a day. It takes at least 556 days to dig out a complete bitcoin. If it is not lucky in the middle of the way, it will be difficult to dig out a complete bitcoin, It may take more time

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6. The use of bitcoin is generally related to the quality of mining machines and the growth of computing power of the whole network. Of course, it is also closely related to the electricity price

generally, the service life of mining machines is the whole network, and the relationship between computing power growth is the biggest, because the updating speed of mining machines is amazing. If you can't keep up with the cutting edge of the times, it's very difficult to make profits by using the old mining machines. Naturally, this kind of mining machine will be eliminated, short days, long months, but the general mining machines are rarely used for a year

of course, if the quality of the miner is OK, it will be OK to use it for one or two years

if your electricity price is low or free, then your mining machine will have a long service life, because a large amount of mining consumption is electricity

of course, it is only related to the price of currency. If the price of currency is high and profitable, the life of mining machinery will be delayed, and if the price of currency remains low, the mining machinery will be eliminated quickly.

7. In January 2013, Avalon released the 60g / s miner specification and accepted the booking. In January 2013, Avalon delivered the world's first commercial bitcoin ASIC miner, and Jeff garzik, the core developer of bitcoin network, was fortunate to be the owner of the first commercial ASIC miner.

the most difficult mining problem is 0. At the beginning of 2013, the computing power was about 2p, and now it has reached 100p

8. The cultivation of computational ability is an important task in primary school mathematics teaching. In primary school mathematics teaching, the proportion of calculation is obvious. From the point of view of the score of a test paper, the calculation of 100 points in the test paper accounts for about 40 points, not including the calculation in comprehensive application. For a long time, the boredom of the calculation class makes the students afraid. For calculation, it is necessary for teachers to start from the characteristics of teaching materials, the actual life of students, the psychological characteristics of children, contact the game activities, and carry out the integration of multimedia, so as to create a learning environment full of children's interest and vitality, and let students enjoy learning and love learning, On this basis, stimulate students' interest, so that boring computing teaching radiates new vitality, so how to cultivate students' computing ability? I would like to share with you the following aspects< To cultivate students' interest in computing and improve their computing ability
Tolstoy said, "what is needed for successful teaching is not coercion, but stimulation of students' interest.". Let students study in a pleasant atmosphere, can arouse students' strong desire for knowledge. Interest is not born, but through the novelty, uniqueness and sensibility of external things to meet the needs of students' psychological inquiry. Interest is the guide for students to get started and the internal motivation to attract students to enjoy learning. As a teacher, in the actual teaching process, we should pay attention to cultivating students' interest in learning, actively understand what students think and think, reasonably organize teaching according to students' different needs, excavate the internal interest factors in teaching materials, and turn boring computing knowledge into interesting mathematical problems Math story
1. The new curriculum standard puts forward "let students learn mathematics in a vivid and specific situation". Therefore, I put the calculation teaching in a certain situation, which makes the boring calculation class full of interest. For example, when consolidating the "7's addition and subtraction method", I first show the scene of the kitten catching butterflies on the grass, a total of 7 butterflies. Let the students observe carefully, talk about what the kitten should do on the grass, encourage the students to use their imagination and make up the story situation. Let the kitten continue to scratch, according to the results of the kitten scratch, list the formula. In this way, through the situation of kitten catching butterflies created in the textbook, students can consolidate the calculation in the process of wholehearted devotion to help kitten catch butterflies, not only learning happily, but also the accuracy of calculation is high
2. Choose appropriate games to cultivate interest in computing. Through the game, students understand that the society is inseparable from computing knowledge, and stimulate their interest in computing in the combination of learning and using. For example, the introction of the game "find friends" in the teaching of low-grade computing can not only carry out oral arithmetic practice, but also stimulate students' interest in computing. The specific method is: take the result of finding friends and is 10 as an example. The teacher patted his hand and asked: looking, looking, looking for friends, who will my little 3 go to? The student patted his hand and answered: find, find, find friends, your little 3 find little 7. In this way, the relatively boring learning of computing will become vivid and interesting, and students will be interested in learning, so as to get twice the result with half the effort
3 capture life information and cultivate interest in computing. By using the captured life information and introcing new knowledge, students can have a sense of closeness to computing and feel that computing and "life" are not mysterious. For example, when I was teaching the score application questions, I happened to meet the Olympic Games to be held in Beijing. So I prepared the situation that the Chinese team won medals in the previous two Olympic Games before class. In class, I asked the students to make up the questions themselves, and the students were full of interest. For example, "in the previous two Olympic Games, the Chinese athletes won 32 gold medals, among which the female athletes won the most, How many gold medals did the female athletes win The students quickly come up with the formula, 32 ÷ eight × 5 = 20, this is a practical problem that students are interested in. It makes them feel that they are not solving problems, but solving problems in life. It not only exercises students' ability to capture information, but also cultivates students' interest in computing
4. Stimulate interest in computing with the help of multimedia. The use of multimedia can change the traditional teaching and learning methods, adjust the classroom atmosphere, stimulate students' strong interest in computing, and guide students to actively participate in learning. For example, when teaching "different denominator score addition and subtraction method" 1 / 2 + 1 / 3, the screen first shows the picture of the first cake, inspiring the question: what is the result of 1 / 2 + 1 / 3? Use the animation function of multimedia to divide it into six parts. Then I ask the students not only to calculate the results, but also to talk about what they think. Students have a little difficulty, so I use multimedia animation effect to make students intuitively observe 1 / 2 + 1 / 3, and the result is 5 / 6. In this way, the whole thinking process is contained in the screen, which makes students have a strong desire for calculation and stimulates their self-confidence in learning calculation
Second, pay attention to the form of practice, improve students' computing ability
practice is not to ask students to endlessly do some repetitive, monotonous questions. In order to improve the efficiency of practice, the forms of practice should be flexible and diverse. Interesting data, novel question types and ingenious algorithms will make students attractive to boring calculation. Combined with the daily teaching content, students can practice some oral arithmetic. When practicing oral arithmetic, we can use the forms of raising cards, rushing to answer, driving a train, who is the champion of oral arithmetic and so on. In order to make students feel fresh all the time, the forms of calculation exercises should be varied, such as games, competitions, rush answers, train driving, limited time oral arithmetic, self compiled calculation problems, group competitions and so on. Practice requires less food and more meals, the same calculation exercises, put in different situations, the effect is also very different. In such an "entertainment" atmosphere, students have high interest in calculation, fast problem solving speed and strong consolidation< In the past few years, I have deeply realized the importance of cultivating students' good computing habits. There are some students, before the examination alone, the results will change a lot. Analysis of the reason is not the basic things do not grasp, but the usual habits do not. Good computing habits can not only improve learning efficiency, but also help the cultivation of computing ability. As Mr. Ye Shengtao said, "ecation is to cultivate good habits in one word." So, in primary school mathematics calculation teaching, what good calculation habits should we cultivate students
1. The habit of serious examination
careful examination is an important prerequisite for correct calculation. For calculation problems, some students can write, and the calculation is monotonous and boring, which may cause psychological fatigue. When they encounter similar numbers and symbols, they often make mistakes. In teaching, I ask students to take a look at the whole formula, which is composed of several parts, and think about how to calculate according to the general rules; Let's see if there are any special conditions. Can we use a simple method to calculate them. In particular, students are required to be full of confidence and patience when calculating. They will never stop until they finish a problem and do something wrong. As time goes by, they will develop a good habit of examining problems
2. The habit of writing carefully
in the teaching of calculation, students should be trained to write their homework and exercises neatly, not scribble, and the format should be standardized. The writing of numbers, decimal points and operation symbols in the title must be standardized, and the interval between numbers should be appropriate. Only by writing carefully, can the accuracy of students' calculation be improved
3. The habit of making drafts
some students make mistakes because they don't make drafts and use oral arithmetic. In view of this situation, I require each student to have a draft book, the upper row of the draft should be clear, and the digits should be aligned. I also often check the students' draft books from time to time, praise the students who are accurate and serious, and promote the students to form the habit of drafting
4. The habit of checking calculation carefully
checking calculation is an important part of the calculation process, and it is also a habit that students must cultivate. From the quality control situation of the curriculum reform period in our county, the students missed to do the topic, the examination was not strict, and the calculation would not be checked, resulting in a lot of meaningless points lost. In order to cultivate students' checking habit, I require students to do self-examination and checking after finishing their homework. In the calculation, we should insist on doing one-step calculation; Check repeatedly ring calculation; Check up and down when taking off; After the calculation, check it as a whole and train it repeatedly. In this way, we can check the calculation at any time, find and correct the errors in time, and ensure the correctness of the calculation results< In the process of learning, teachers should allow students to make mistakes. The key is to guide students to learn from their mistakes so that they will not make mistakes next time. Strengthening reflection after practice can improve students' ability of analysis and judgment. In the calculation, students' mistakes always emerge in endlessly. It's not ing the wrong number, it's reciting the wrong multiplication formula, or it's the wrong decimal point. They are all very small mistakes, but they often appear, which can't be ignored. Therefore, I always insist on face-to-face review of homework. At the same time, I ask students to record their mistakes, accumulate some typical error prone questions, and make a wrong problem set, and carefully analyze the causes of mistakes. I often check them to prevent similar mistakes; Some students have developed the method of "reading softly" for "ing wrong questions"; After each test, ask the students to find out the cause of the error and correct it. Practice has proved that fully mobilize the initiative of students, seriously reflect and correct mistakes, can achieve high efficiency, high quality effect
in a word, it is not an overnight task to cultivate students' computing ability, which should run through the whole process of primary school mathematics teaching. In primary school calculation teaching, our teachers should constantly think and innovate calculation teaching methods, combine the life reality and emotional attitude advocated by the new curriculum standard, and avoid the singleness and dryness of calculation. Then, we can believe that the day when students' calculation ability will be improved will not be far away.

9. Bitcoin mainly plays with GPU, and notebook GPU can't compare with mining machine or high-end desktop; Now the mine pool is more than 900 million. How many GPUs can you run per second? Then divide 900 million by this number, that is how long it will take to dig one. But this number is not absolute. Maybe it won't be able to dig one at this time! Maybe we got it ahead of time
according to 3gb / s, it takes about 9 years to dig one