Trinidad and Tobago

#191 of 193 countries

87464323263862246

That piece first turns up at decimal place 31,653,199,602 of π (about 31.7 billion digits in).

Trinidad and Tobago is 17 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 8746432326.