January 13, 2014. Difficulty rose by +26.16% to 1.79B from 1.42B.
Change
+26.16%
New difficulty
1.79B
Period length
11.1 days
Network hashrate then (7-day)
0.0 EH/s
Bitcoin price then
$844
Hashprice then
$223,885/PH/day
The 2,016 blocks before it took 11.1 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 26.16%: 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.