Dorothea Erxleben
Monday Open Thread; November 13 is World Kindness Day
Submitted by enhydra lutris on Mon, 11/13/2017 - 5:00amNovember 13 is the 317th day of the year, there are 48 days left
Today's number is 13
13 is
13 is a prime number, it is the 6th prime
13 is also a prime if the digits are reversed (31)
13 is a pythagorean prime (13 = 3**2 + 4**2 & 13 = 4n+1 where n =3)