<P> He holds the current unofficial world record ( 100,000 digits ) in 16 hours , starting at 9 a.m ( 16 : 28 GMT ) on October 3 , 2006 and having recited up to 83,431 digits by nightfall , stopping with digit number 100,000 at 1 : 28 a.m. on October 4 , 2006 . The event was filmed in a public hall in Kisarazu , east of Tokyo , where he had five - minute breaks every two hours to eat onigiri to keep up his energy levels . Even his trips to the toilet were filmed to prove that the exercise was legitimate . Haraguchi 's previous world record ( 83,431 ) , was performed from July 1 , 2005 to July 2 , 2005 . On Pi Day , 2015 , he claimed to be able to recite 111,701 digits . </P>
<P> He holds the current unofficial world record ( 100,000 digits ) in 16 hours , starting at 9 a.m ( 16 : 28 GMT ) on October 3 , 2006 and having recited up to 83,431 digits by nightfall , stopping with digit number 100,000 at 1 : 28 a.m. on October 4 , 2006 . The event was filmed in a public hall in Kisarazu , east of Tokyo , where he had five - minute breaks every two hours to eat onigiri to keep up his energy levels . Even his trips to the toilet were filmed to prove that the exercise was legitimate . Haraguchi 's previous world record ( 83,431 ) , was performed from July 1 , 2005 to July 2 , 2005 . On Pi Day , 2015 , he claimed to be able to recite 111,701 digits . </P>
who held the record for most memorized digits the longest
who held the record for most memorized digits the longest
Haraguchi
Haraguchi