Prosecutors and defense lawyers were miles apart yesterday as they argued how much financial gain should be attributed to Raj Rajaratnam when Southern District Judge Richard Holwell sends him to prison in the Galleon Group hedge fund scandal.

Special Assistant U.S. Attorney Andrew Z. Michaelson told Judge Holwell that Mr. Rajaratnam was guilty of “serial insider trading” that produced illicit gains of $72 million. That number, if accepted by the judge along with sentencing enhancements for taking a leadership role and obstructing justice, would mean a guidelines sentencing range of 19½ to 24½ years in prison.