Yesterday, Bitcoin miners spent 17 minutes searching for a new block instead of the standard ~10 minutes.
There have been cases where the interval between blocks was significantly longer: one of the records is 85 minutes. There are also documented cases of blocks that took up to 2 hours and 19 minutes.
The longest recorded interval was between block 0 (the genesis block) and block 1 — about 5 days and 8 hours.
Long intervals may be related to a drop in hashrate (fewer miners or equipment shutdown), which slows down the discovery of the next block.
