Saint Kitts and Nevis

#165 of 193 countries

724685488726363847

That piece first turns up at decimal place 4,223,350,068 of π (about 4.2 billion digits in).

Saint Kitts and Nevis is 18 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 7246854887.