Lu Chao (China) memorized a total of 67,890 digits of pi in 24 hours and 4 minutes, at the Northwest A&F University, China, on November 20, 2005. He successfully recited the digits with an error at the 67,891st digit, saying it was a “5”, when it was actually a “0”. He says it took him about 1 year to memorize 100,000 digits.