General fact: 117 is the substitute for the number 17, which is considered unlucky in Italy.
Mathematical fact: 117 is the smallest possible length of the longest side of a Heronian tetrahedron (one whose sides are all rational numbers).
Trivia: 117 is the height in metres of the tallest tree recorded, located in Humboldt Redwoods State Park, California.
Historical date: April 26th is the day in 1986 that a nuclear reactor accident occurs at the Chernobyl Nuclear Power Plant in the Soviet Union (now Ukraine), creating the world's worst nuclear disaster.