Grandinite

It blows me away what the Human mind is capable of sometimes.

Wiki: Daniel Tammet

Daniel Paul Tammet (born January 31, 1979) is a British autistic gifted with a facility for mathematics problems, sequence memory, and natural language learning. He was born with congenital childhood epilepsy.

Experiencing numbers as colors or sensations is a well-documented form of synaesthesia, but Tammet is unique in how specific his mental imagery of numbers is: he claims that in his mind each number up to 10,000 has its own unique shape and feel, and he can “sense” whether a number is prime or composite, and “see” results of calculations as landscapes in his head.

Tammet holds the European record for remembering and recounting pi, recounting it in a several-hour session to its 22514th digit