December 31, 2018. Difficulty rose by +10.03% to 5.62T from 5.11T.
Change
+10.03%
New difficulty
5.62T
Period length
12.7 days
Network hashrate then (7-day)
40.7 EH/s
Bitcoin price then
$3,811
Hashprice then
$168/PH/day
The 2,016 blocks before it took 12.7 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 10.03%: one of the largest adjustments on record. For every machine on the network that is a pay cut of the same size until the next retarget.