SindSagar bhai thanks for posting but kindly mention source also. I think u posted from here.
http://www.andhranews.net/Sports/2008/June/24-Hanif-Mohammed-50880.asp
Yes he is a current world record holder for** Longest individual inning (by minutes)**
But in first class cricket R Nayyar of Himachal Pradesh brokes the record of Hanif
Source:
http://stats.cricinfo.com/ci/content/records/284006.html
http://stats.cricinfo.com/ci/content/records/283145.html