Longest individual first-class innings (male)

Longest individual first-class innings (male)
Who
Rajiv Nayyar
What
16/55 hour(s):minute(s)
Where
India (Chamba)
When
Rajiv Nayyar (India) batted for 16 hrs 55 mins, when scoring 271 for Himachal Pradesh against Jammu & Kashmir at Chamba, India from 1–3 Nov 1999.