Between 1998 and 2000, the distributed computing project PiHex used Bellard 's formula (a modification of the BBP algorithm) to compute the quadrillionth (10 th) bit of π, which turned out to be 0. In September 2010, a Yahoo! employee used the company 's Hadoop application on one thousand computers over a 23 - day period to compute 256 bits of π at the two - quadrillionth (2 × 10 th) bit, which also happens to be zero.
as of today pi has been calculated out to how many digits
the two - quadrillionth (2 × 10 th) bit