math_fact: 8991 is the smallest number so that it and its successor are both the product of a prime and the 5^{th} power of a prime.
trivia: 8991 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: August 12th is the day in 1964 that Charlie Wilson, one of the Great Train Robbers, escapes from Winson Green Prison in Birmingham, England.