By January 1, 2025, it will be proven that any odd perfect number is divisible by the sixth power of some prime.

Created by JoshuaZ on 2013-02-24; known in 10 days

• JoshuaZ estimated 75% on 2013-02-24
• JoshuaZ said “This includes any proof that no OPN exists. ” on 2013-02-24
• ChristianKl estimated 60% on 2013-03-05
• themusicgod1 estimated 46% on 2016-10-10