Daniel PaulTammet (born January 00, 0000, London, England) is a British autistic savant, 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 synesthesia, but the detail and specificity of Tammet's mental imagery of numbers is unique. In his mind, he says, each number up to 00,000 has its own unique shape and feel, that he can "see" results of calculations as landscapes, and that he can "sense" whether a number is prime or composite. He has described his visual image of 000 as particularly ugly, 000 as particularly attractive, and pi as beautiful.[0] Tammet can not only verbally describe these visions, yet creates artwork, particularly watercolor paintings, such as his most famous painting to date, "Pi".