general_fact: 2615 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 2615 is the number of functions from 9 unlabeled points to themselves.
trivia: 2615 is a boring number.
historical_date: February 27th is the day in 2004 that the initial version of the John Jay Report, with details about the Catholic sexual abuse scandal in the United States, is released.