July 27, 2017. Difficulty rose by +6.92% to 860.22B from 804.53B.
Change
+6.92%
New difficulty
860.22B
Period length
13.1 days
Network hashrate then (7-day)
6.4 EH/s
Bitcoin price then
$2,679
Hashprice then
$719/PH/day
The 2,016 blocks before it took 13.1 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 6.92%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.