Hey Shamimah ,

The cutoffs for JIPMER entrance exam are in the form of percentile. You can easily calculate your percentile when your rank is given.

Your percentile =  (your rank / total no. Of students appeared for exam )×100

And the minimum percentile for qualifying JIPMER Entrance exam is 50th percentile for UR ,OCI and NRI students ,45th percentile for UR PH students and 40th percentile for other categories.

You can also check JIPMER cutoffs for 2019 and the recent past years by following the given link :

https://medicine.careers360.com/articles/jipmer-cut-off

And as you are asking maximum rank , then maximum rank that any student can get is 1.

Hope it helps!