725 Win margin by runs for Mumbai in their quarter-final against Uttarakhand, the biggest win in terms of runs in first-class cricket. The previous biggest was 685 runs for New South Wales in the 1929-30 Sheffield Shield game when Queensland were bowled out for 84, chasing a target of 770.
540 Bengal's win margin by runs against Orrisa in the 1953-54 season, the biggest win in terms of runs in the Ranji Trophy before Mumbai's 725-run triumph. The previous highest win by runs in Indian first-class cricket was South Zone's 552-run win against Central Zone in the 2010-11 Duleep Trophy.
533 First-innings lead for Mumbai against Uttarakhand, their highest first-innings lead in a first-class match. Their previous highest was 530 runs against Maharashtra in the 1950-51 Ranji Trophy.
1 Instances of a team not enforcing the follow-on after taking a lead of over 500 runs in Indian first-class cricket, before Mumbai against Uttarakhand. The previous instance was by Jharkhand, who decided not to enforce the follow-on recently against Nagaland, despite a 591-run lead during the pre-quarters of the ongoing edition of Ranji Trophy.
252 Suved Parkar's score during Mumbai's first innings. He is only the fifth batter to score 250-plus runs on his debut in first-class cricket. Four of those five scores have come in the Ranji Trophy.
9 50-plus scores in Bengal's first innings against Jharkhand, the first ever instance of nine players scoring 50-plus runs in the same innings in first-class cricket. There has been only one previous instance of more than seven 50-plus scores in a first-class innings - eight by the touring Australians against Oxford and Cambridge Universities way back in 1893.
773 for 7 Bengal's first-innings total against Jharkhand is their highest in first-class cricket. Their previous highest was 760 against Assam in the 1951-52 Ranji Trophy.
18 Balls for Akash Deep to complete his fifty against Jharkhand. It is the joint third-fastest known fifty in the Ranji Trophy. Only Bandeep Singh (15 balls) against Tripura in 2015-16 and Pankaj Jaiswal (16 balls) against Goa in 2017-18 recorded fifties in fewer balls than Akash.