Numberphile, a YouTube channel dedicated to videos about numbers, partnered with HP Specialty Printing Systems OEM customer HSA Systems to print one million digits of the mathematical constant Pi on a single piece of paper. See videos demonstrating how they produced the print here and when they unrolled it on a U.K. airfield here. 

Powered by HP Thermal Inkjet 2.5 technology, Denmark-based HSA Systems brought Numberphile’s quirky idea to life using only one HP Durable Black print cartridge – just 8 mL of ink – and one roll of brown 70gsm Kraft Paper in 40 minutes. The number was formatted in eight point Courier New font.

“HP ink withstood challenging U.K. weather conditions like wind, rain and mist, and the last digit was printed as clear as the first one,” said Brady Haran, filmmaker and video journalist, Numberphile. “This is a remarkable proof point for the reliability, consistency and efficiency of Original HP inks.”

This unique project has already been rated as a world record by an independent mathematical professor, and its official application for the Guinness Book of World Records has been submitted.