Your European buddy is known as…
ELISE, and he or she lives in LILLE (France).
Finding the identify:
We’re on the lookout for a non-prime quantity related to Trussville in Alabama. What numbers are normally related to cities? Why their ZIP code, in fact!
It seems that the ZIP code for Trussville, Alabama is 35173. This is a composite quantity, being $17 * 2069$. If we write this on a seven-segment show and switch it the other way up, we spell out ELISE:
Likewise, town:
The ZIP code for Clinton, Tennessee is 37717, a first-rate quantity this time. If we write this on a seven-segment show and switch it the other way up, we spell out LILLE: