NEW YORK — Convicted Wall Street swindler Bernard Madoff was sentenced to 150 years in prison Monday for a fraud so extensive that the judge said he needed to send a message to potential imitators and to victims who demanded harsh punishment.

Scattered applause and whoops broke out in the crowded Manhattan courtroom after U.S. District Judge Denny Chin issued the maximum sentence to the 71-year-old defendant, who said he lives "in a tormented state now, knowing all the pain and suffering I've created."

Chin rejected a request by Madoff's lawyer for leniency and said he disagreed that victims of the Ponzi scheme were seeking mob vengeance.

"Here the message must be sent that Mr. Madoff's crimes were extraordinarily evil and that this kind of manipulation of the system is not just a bloodless crime that takes place on paper, but one instead that takes a staggering toll," Chin said.

The judge said the estimate that Madoff has cost his victims more than $13 billion was conservative because it did not include money from feeder funds.

"Objectively speaking, the fraud here was staggering," he said.

Chin announced the sentence with Madoff standing at the defense table, wearing a dark suit, white shirt and a tie, and looking thinner than his last court appearance in March. He gave no noticeable reaction when the sentence was announced.

He also showed no emotion earlier in the hearing as he listened to nine victims spend nearly an hour describing their despair. Some openly wept. Others raised their voices in anger.

"Life has been a living hell. It feels like the nightmare we can't wake from," said Carla Hirshhorn.

"He stole from the rich. He stole from the poor. He stole from the in between. He had no values," said Tom Fitzmaurice. "He cheated his victims out of their money so he and his wife Ruth could live a life of luxury beyond belief."

Dominic Ambrosino called it an "indescribably heinous crime" and urged a long prison sentence so "will know he is imprisoned in much the same way he imprisoned us and others."

He added: "In a sense, I would like somebody in the court today to tell me, how long is my sentence?"

When asked by the judge whether he had anything to say, Madoff slowly stood, leaned forward on the defense table and spoke in a monotone for about 10 minutes. At various times, he referred to his historic fraud as a "problem," "an error of judgment" and "a tragic mistake."

He claimed he and his wife were tormented, saying she "cries herself to sleep every night, knowing all the pain and suffering I have caused," he said. "That's something I live with, as well."

He then finally looked at the victims lining the first row of the gallery.