May 1, 2021. Difficulty fell by -12.61% to 20.61T from 23.58T.
Change
-12.61%
New difficulty
20.61T
Period length
16.0 days
Network hashrate then (7-day)
159.7 EH/s
Bitcoin price then
$54,491
Hashprice then
$320/PH/day
The 2,016 blocks before it took 16.0 days, longer than the 14 intended, so hashrate had fallen, and difficulty fell by 12.61%: one of the largest adjustments on record. For every machine on the network that is a pay rise of the same size until the next retarget.