October 8, 2016. Difficulty rose by +7.17% to 258.52B from 241.23B.
Change
+7.17%
New difficulty
258.52B
Period length
13.1 days
Network hashrate then (7-day)
1.8 EH/s
Bitcoin price then
$615
Hashprice then
$620/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 7.17%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.