Bitcoin network undergoes largest difficulty drop ever by nearly 28%


Quick Take

  • The Bitcoin network’s mining difficulty has decreased, taking into the account the recent drop in hash rate.
  • This latest difficulty adjustment was the largest in its history.

The mining difficulty of the Bitcoin network has dropped by 27.9%, as the network adjusts to the massive drop in hash rate. This is the biggest decrease in mining difficulty since the network went live in 2009.


The Bitcoin network updates its mining difficulty level every 2,016 blocks, which is roughly every two weeks. This is designed to make sure blocks are produced every ten minutes or so, despite a fluctuating hash rate.

And in this case, the hash rate has certainly been volatile. Since the previous adjustment on June 13, Bitcoin’s seven-day moving average hash rate has fallen from 136.47 EH/s to 85 EH/s — down 35%.

This was largely caused by a crackdown on bitcoin mining in China, which is causing the hash rate to migrate as operations seek friendlier jurisdictions elsewhere. The eventual record-high drop on Saturday was in a much higher percentage than what was estimated to be a week ago.

This lower hash rate led to a slower rate of block production as the remaining hashing power was unable to keep up with the high difficulty level. For the last two weeks, blocks were produced nearly every 13.9 minutes on average, much higher than usual, based on The Block’s calculation.

On July 1, it even took 129 minutes to produce a block, the longest time since 2011, although it’s worth noting that multiple factors come into play here, including the inherent variance in block times.

© 2021 The Block Crypto, Inc. All Rights Reserved. This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.

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