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If you want to mine bitcoin then you should buy a bitcoin ASIC miner and run it yourself. Do the necessary research first. Almost all cloud mining services are scams. But there have been a (very) few that were not - although they were not profitable for customers. So there are two possibilities: You pay someone 1.0 BTC and they run off with your bitcoin. ...


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What you describe happens normally and is not an issue in practice. Even if one eventually wins out wouldn't a lot of people lose money because of how many transactions were invalidated? No, those transactions are included in later blocks. I'm not sure of the exact method but I think it must be either that nodes return transactions from stale blocks to ...


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(target + space - guess) * 100 / space So for example, if your numbers had to be less than 200 and you needed to be less than 20 but got 30, your guess is (20+200-30)*100/200 or 95% right. This makes sense. There were 200 possible results. You needed to be in a range that covered 10% of that space. You missed by 10, which is 5% of the space. So you were 95% ...


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