July 14, 2017. Difficulty rose by +13.53% to 804.53B from 708.66B.
Change
+13.53%
New difficulty
804.53B
Period length
12.3 days
Network hashrate then (7-day)
5.8 EH/s
Bitcoin price then
$2,142
Hashprice then
$719/PH/day
The 2,016 blocks before it took 12.3 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 13.53%: 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.