Daniel Tammet


By Darold Treffert, MD


Daniel Tammet first came to worldwide attention in March, 2004 on international Pi Day (3/14 of course) when he recited, from memory, Pi to 22,514 decimal places. It took over five hours and set a new European record. The event, which Daniel named “Pi in the Sky,” coincided with Einstein’s birthday and took place in front of Einstein’s blackboard at the Museum of the History of Science in Oxford, England.

Daniel used that event to raise funds for the National Society for Epilepsy because it was after a series of childhood seizures that his extraordinary number and memory abilities began, aligning him with that rare circumstance of the “acquired savant” in which such exceptional skills surface following some central nervous system injury or disease. He is proud of the monies raised on behalf of this organization, and certainly gave this worthy cause a good deal of visibility.

In addition to number and massive memory skills, Daniel has exceptional language skills as well. He speaks French, German, Spanish, Lithuanian, Esperanto and Icelandic. He learned the difficult Icelandic language in seven days, which was carefully documented in the one-hour film about Daniel titled Brainman.

That documentary, Brainman, which also goes by the alternative title of The Boy with the Incredible Brain, has been shown in both the United Kingdom and the United States on various channels. Whenever that film appears in this country on the Discovery Channel it generates a number of inquiries to this website about Daniel and his remarkable abilities. In one scene Daniel is asked to calculate 37 raised to the power of 4. He gave the correct answer of 1,874,161 in less than one minute. Then asked to divide 13 by 97 he outdistances the interviewers computer calculator 32 decimal places with the ability to go to over 100 decimal places if one wanted him to recite that long string of digits. The film also shows Daniel’s ability to memorize the position of all the chess pieces on a particular board at a point in time, and, as mentioned, documents Daniel’s acquisition of the Icelandic language in only a seven day time span.

While filming Brainman, Daniel had the opportunity to meet and interact with Kim Peek. Both Kim and Daniel have massive memory capacity quantitatively, but the nature of that massive memory differs somewhat qualitatively. Kim has a huge store of factual material, but disqualifies himself a bit when it comes to math simply saying that is not an area of interest or strength for him. Daniel’s strength, on the other hand, is not in factual storage, but rather the ability to faithfully recall huge strings of numbers (or other items) which he literally “sees” before him as if on a tapestry of images, and in his ability to manipulate those numbers with incredible speed in various calculations and derivations. Both Kim and Daniel, however, are continually flooded with data within their areas of interest and expertise, vacuuming up such data instantly and storing it for later retrieval with incredible speed and seemingly bottomless depth.

I had the opportunity to meet Daniel at the Milwaukee Art Museum while filming Brainman. His digit span memory exceeded that of anyone I had ever tested before and other tests of recall were, of course, entirely accurate. Daniel is a very polite, soft-spoken, gentle person; preoccupied at times and shy, not boastful about his enormous abilities. He described to me how he assigns a shape and color to each number, reaching into the thousands. As he remembers, or computes, these images appear as just that—images and colors—which he “simply” recites as he views them. When computing, the images merge together and out comes the new, correct combination for his instant inner viewing.  At the museum  there was a very tall tree-like structure composed of variously shaped and colored blown-glass composite pieces, positioned together like ornaments on a Christmas tree.  Daniel identified with many of those shapes and colors, each representing, as it were, one of the numbers and images continually present in his head. While it is difficult to image exactly what Daniel is experiencing as he “sees” numbers and objects flowing before him, that tree-like composite of colors and shapes provided, for me, some reference point, at least to better sense what that colorful, moving tapestry must be like embedded as it is, with the huge store of numbers which have become, by his own description, Daniel’s friends.

Daniel’s first book—Born on a Blue Day: A Memoir of Asperger’s and an Extraordinary Mind—was published in 2006. I had the opportunity to write the Foreword to that book.  The book was subsequently published in the United States by Free Press and became a New York Times best seller. It has been translated now into 18 languages. That book provides a great deal of insight into his very unique number, language and memory skills, and into his life overall.

In his second book, Embracing the Wide Sky: A Tour Across the Horizons of the Mind (2009), Daniel explores and summarizes the science surrounding special skills such as he possesses. Since most articles and books are written by others about savant syndrome and other persons with special skills, it is particularly insightful to have a book written by a person with special skills at the prodigious savant level.  His first hand account of his extraordinary number, language, memory abilities, along with his synesthesia capabilities, coupled with his  ideas as to how those interrelate causally, represent a truly  unique, and particularly insightful, viewpoint and perspective.

Subsequent works by Daniel Tammet include Thinking in Numbers (2012), Every Word is a Bird We Teach to Sing (2017) and Portraits (2019). He offers foreign language courses at http://www.optimnem.co.uk/ .

Learn more about Daniel at http://www.danieltammet.net/


Additional Reading

Tammet, Daniel. (2008). Born on a Blue Day: Inside the Extraordinary Mind of an Autistic Savant: a Memoir. Paw Prints.

Tammet, D. (2010). Embracing the wide sky: A tour across the horizons of the mind. New York: Free Press.

Treffert, D. A., & Tammet, D. (2012). Islands of genius: The bountiful mind of the autistic, acquired, and sudden savant.



Savant Syndrome FAQ and Profiles

View Savant Syndrome FAQs and read fascinating profiles of artistic savants.

Recommended Reading

Choose from a list of books to learn more about savant syndrome or do in-depth research using the bibliography provided by Dr. Treffert.

Treffert Library

The Treffert Library features the life works of Dr. Treffert, helping to foster research and knowledge across the autism and savant syndrome spectrum and other forms of exceptional brain performance.