Something special about 399 (and 2015)
It is the lowest Lucas-Carmichael Number... Featuring Ed Copeland.
More about Ed's real work: http://bit.ly/CopelandGoesLong
This is Numberphile. We mainly post videos about mathematics and just numbers in general.
It is the lowest Lucas-Carmichael Number... Featuring Ed Copeland.
More about Ed's real work: http://bit.ly/CopelandGoesLong