May 30, 2021. Difficulty fell by -15.97% to 21.05T from 25.05T.
Change
-15.97%
New difficulty
21.05T
Period length
16.7 days
Network hashrate then (7-day)
149.8 EH/s
Bitcoin price then
$37,878
Hashprice then
$232/PH/day
The 2,016 blocks before it took 16.7 days, longer than the 14 intended, so hashrate had fallen, and difficulty fell by 15.97%: 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.