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I thought it should take about 30 minutes, about 1 confirmation every 10 minutes?
Its one confirmation every 10 minutes on average Sometimes its an hour, sometimes its like 15 seconds, but the average is 10 minutes and if its more or less the difficulty will adjust.
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Theoretically A miner or group of miners is hashing faster than the difficulty adjustment constricts. Up to two weeks this may happen and then the difficulty will get harder if the average time is less than 10 minutes.
I'm not a miner but that's what my study has led me to believe.
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Ce délai varie en général de 1 à 10 minutes mais peut parfois mettre plus longtemps.
Lorsque vous envoyez du Bitcoin, la transaction doit être approuvée par le réseau avant d’être incluse dans un nouveau bloc de la blockchain