Federal prosecutors say former congressman Anthony Weiner should go to prison for about two years for engaging in sexting with a 15-year-old girl.

Prosecutors filed papers in Manhattan federal court Wednesday urging a judge to send a message at sentencing Monday.

The 53-year-old New York Democrat said in a submission last week that he's undergoing treatment and is profoundly sorry for subjecting the North Carolina high school student to what his lawyers called his "deep sickness." Prosecutors say he's promised in the past that he's reformed.

Defense lawyers had portrayed the girl as an aggressor, saying she wanted to generate material for a book and possibly influence the presidential election.

As part of a plea bargain, Weiner has agreed not to appeal any sentence between 21 and 27 months.