The most prolific rapist in British history was jailed for life Monday after he was convicted of attacking and filming more than 100 straight men whom he left comatose with drugs.

Reynhard Sinaga, 36, slipped GBH to his victims so he could rape them at his apartment while he was a student living in Manchester, according to testimony at four separate trials that could be reported for the first time Monday.

The Singapore native was convicted of 128 rapes of 48 men, ages 17 to 36, as well as 16 attempted rapes, 13 sexual assaults and two assaults by penetration, all from January 2015 to June 2017.

Sinaga’s reign of terror finally ended when a teenager woke up while being raped and beat the sex attacker so badly that he had to be hospitalized, the Manchester Evening News reported.

“You are an evil serial sexual predator,” Judge Suzanne Goddard told Sinaga as she sentenced him to life in prison with a minimum of 30 years.

“One of your victims described you as a monster. The scale and enormity of your offending confirms this as an accurate description.”

But Manchester Crown Court heard that at least 195 men were filmed during their abuse, many of whom have not been identified — and the judge warned that the true figure could be even higher.

Many of the victims found in Sinaga’s sick recordings did not even know they had been assaulted until contacted by police, officers told the Manchester Evening News, with some even thinking he was a good Samaritan who offered them a place to stay when they were drunk.

Most victims were heterosexual men who Sinaga tried to claim had sex with him because they were bicurious, the paper said.

“Your actions show you are a dangerous, deeply disturbed, and perverted individual with no sense of reality,” the judge told him, condemning the “deep distress and lasting psychological damage” he caused his victims, according to the report.

Manchester Assistant Chief Constable Mabs Hussein confirmed to the paper that Sinaga is believed to be “the UK’s most prolific rapist.”

“I never dreamed it would be possible to come across an individual who has committed such horrific offending over such a period of time,” Hussein said.

Deputy chief prosecutor Ian Rushton called the case “beyond fiction” and “beyond any writer’s imagination.”

“In terms of sexual predatory behavior, this is almost off the scale,” Rushton told the Evening News.

With Post wires