Question: Who has calculated the most digits of pi?
Disambiguated questions and answers: question: Who has calculated the most digits of pi in 2016?
Who has calculated the most digits of pi in 2011?
Who has calculated the most digits of pi in 2009?
answer: Peter Trueb
Alexander Yee and Shigeru Kondo
Fabrice Bellard
Natural Questions answer: Peter Trueb (from the Wikipedia article "Chronology of computation of π")