Today is Day 247 of 2015
| is the smallest possible difference between 2 integers that together contain each digit exactly once.|
its digits sum to its smallest prime factor:
247 = 13 x 19 and 2 + 4 + 7 = 13
Many thanks are extended to Archimedes' Lab for their information.
Today is day number of 2015. Below are various representations of the number 247, some dating thousands of years, and some very modern.
Many thanks are extended to Jo Edkins for her wonderful work.