Fatto generale: 5 is the number of interlocked rings in the symbol of the Olympic Games, representing the number of inhabited continents represented by the Olympians (counting North America and South America as one continent).
Fatto matematico: 5 is the second Sierpinski number of the first kind, and can be written as S2=(22)+1.
Trivia: 5 is the number of permanent members with veto power on the United Nations Security Council.
Data storica: January 5th is the day in 1909 that Colombia recognizes the independence of Panama.