Hero Vietson is nine years old from La Jolla, California, United States of America. He was born with a unique brain structure consistent with savant syndrome, as revealed by CT scans, he is a savant with extraordinary abilities in mathematics, sciences, and memory. He has successfully memorized and orally recited the most digits of Pi. He has meticulously documented his progress in learning 6,500 digits of Pi through 67 videos on his YouTube channel.
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