Subscribe | UPI Odd Newsletter Subscribe WASHINGTON, Aug. 14 (UPI) -- The U.S. population Tuesday passed the nerdy milestone of 100 million times pi, or 314,159,265 residents, the Census Bureau reported. "Shortly after 2:29 p.m. EDT today, the U.S. population clock will reach a milestone that is very meaningful to mathematical statisticians: It will show there are 314,159,265 residents, or pi (3.14159265) times 100 million," the bureau said in a release. Advertisement Pi is a mathematical constant that is the ratio of a circle's circumference to its diameter. "This is a once in many generations event ... so go out and celebrate this American pi," Census Bureau Chief Demographer Howard Hogan said.