No. 1: Gabriel March Grandos – Spain
Public Domain Image: Public Domain
Length of Sentence: 384,912 years
The longest prison sentenced ever demanded by a court of law was given out in Spain, in 1972. Unlike other perpetrators on our list, who received sentences more befitting their crimes, the young Gabriel Grandos, age 22, was accused of fraud because of his failure to deliver a little over forty thousand letters. We understand that messing with the mail system is a serious offense, but a sentence amounting to nearly 400,000 years does seem a bit of an over-kill in this particular case.