general_fact: 791 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 791 is the smallest number n where either it or its neighbors are divisible by the numbers from 1 to 12.
trivia: 791 is an uninteresting number.
historical_date: March 1st is the day in 1642 that Georgeana, Massachusetts (now known as York, Maine), becomes the first incorporated city in the United States.