Central African Republic

#168 of 193 countries

2368725237422673782542

That piece first turns up at decimal place 6,284,945,163 of π (about 6.3 billion digits in).

Central African Republic is 22 digits on the keypad. We look up at most 10 digits at a time, so it is ranked by its longest piece we found: the 10 digits 2368725237.