Zachary Scheich, who prosecutors said identified himself as 17-year-old “Zak Hess,” pleaded guilty to sexual assault and other crimes.

A 27-year-old Nebraska man who posed as someone a decade younger and attended high school for more than 50 days was sentenced to at least 85 years in prison in connection with sex crimes charges, court documents show.

A Lancaster County judge sentenced Zachary Scheich last week after he pleaded no contest in July to first-degree sexual assault, attempted first-degree sexual assault, generation of child pornography — age 19 or over — and child enticement with electronic communication, according to a sentencing order and a plea agreement.

Scheich’s sentence runs a maximum of 120 years in prison, according to the order. He won’t be eligible for parole for 40 years, aaccording to KOLN-TV of Lincoln.