Wikipedia, Numerical approximations of π, 21st century – current claimed world record

In August 2009, a Japanese Supercomputer called the T2K Open Supercomputer was claimed to have more than doubled the previous record by calculating π to 2,576,980,377,524 digits in approximately 73 hours and 36 minutes.

In December 2009 Fabrice Bellard used a home-computer to compute 2,699,999,990,000 decimal digits of π. The base-2 calculation, conversion to base 10 and verification took 131 days.

Pi Computation Record

PC used during the computation:

* Core i7 CPU at 2.93 GHz
* 6 GiB (1) of RAM
* 7.5 TB of disk storage using five 1.5 TB hard disks (Seagate Barracuda 7200.11 model)

Backups were done using 2 TB hard disks (Seagate Barracuda LP model).

The verification of the binary digits used a network of 9 Desktop PCs during 34 hours. It could have been done on the same PC as the main computation by using 13 more days.