A man convicted of 159 sex offences, including 136 rapes, will "never be safe to be released", a judge in Britain has said.
Reynhard Sinaga was found guilty of luring 48 men from outside Manchester clubs to his flat, where he drugged and assaulted them - filming the attacks.
Police say they have evidence Sinaga, 36, who is being named for the first time, targeted at least 190 victims.
The Crown Prosecution Service (CPS) said Sinaga was "the most prolific rapist in British legal history".
The judge ruled his life sentence must include a minimum of 30 years in jail.
Reporting restrictions were also lifted at a sentencing hearing at Manchester Crown Court on Monday, meaning Sinaga could be identified for the first time.
The post-graduate student was already serving life, with a minimum term of 20 years, for the offences he was convicted of in two earlier trials, which took place in summer 2018 and last spring.
Across four separate trials, the Indonesian national was found guilty of 136 counts of rape, eight counts of attempted rape, 14 counts of sexual assault, and one count of assault by penetration, against a total of 48 victims.
Detectives say they have been unable to identify a further 70 victims and are now appealing for anyone who believes they may have been abused by Sinaga to come forward.
At the hearing, Judge Suzanne Goddard QC said Sinaga was "an evil serial sexual predator who has preyed upon young men" who wanted "nothing more than a good night out with their friends".
"In my judgment you are a highly dangerous, cunning and deceitful individual who will never be safe to be released," she said - adding that the decision to release prisoners is made by the Parole Board.
Sinaga would wait for men leaving nightclubs and bars before leading them to his flat in Montana House, Princess Street, often with the offer of somewhere to have a drink or call a taxi.
He drugged his victims before assaulting them while they were unconscious. When the victims woke up many of them had no memory of what had happened.
The student, who denied the charges, had claimed all the sexual activity was consensual and that each man had agreed to being filmed while pretending to be asleep - a defence described by the judge as "ludicrous".
At an earlier sentencing, the judge said she was sure that Sinaga had used a form of date rape drug such as GHB.
Home Secretary Priti Patel said she was "deeply concerned" by the use of such a drug.
In victim impact statements read out in court, one victim said Sinaga had "destroyed a part of my life", while another said: "I hope he never comes out of prison and he rots in hell."
"I have periods where I can't get up and face the day," another added.
Many of the victims were unaware they had been raped until they were contacted by police.
Lisa Waters, of the St Mary's Sexual Assault Referral Centre in Manchester, where victims received support, said some men found this "very difficult to process", with some experiencing mental health issues and suicidal thoughts.