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Hashrate or difficulty? I'm not sure what are you replying to.
I think he means difficulty because hash rate and price are usually correlated
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Both. If difficulty doubles, the required hashrate to produce a block in the same amount of time also doubles. Could be either total # of hashes for all miners combined, or # of hashes per CPU. Whatever your hashrate, it has to "change to ensure the blocks are created at a predictable rate."
What did you mean?
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