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A comment on Bitcoin mining hash rate drops as blackouts instituted in China. Parent comment
https://bitcoin.org/bitcoin.pdf
If you have 51% of the power, you can roll back everything if you spend enough time on it. If you have 30%, you have a 4% chance of being able to catch up from 10 blocks behind, even if you spend infinite time on that specific fork.
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https://bitcoin.org/bitcoin.pdf
If you have 51% of the power, you can roll back everything if you spend enough time on it. If you have 30%, you have a 4% chance of being able to catch up from 10 blocks behind, even if you spend infinite time on that specific fork.