The most brilliant.

Kim Ung-yong.

He's a Korean child prodigy. And is still alive today.

He's recognized by the Guinness Book of World Records as having the highest IQ (around 210) on the planet NOW (used to be someone else, but he died). An average person's IQ is around 85 to 115. If yours is 136 and above, you're considered pretty brilliant.

He was able to read and write in Japanese, Gernam, Korean and English by his fourth birthday. Also, at the age of four, on November 2, 1967, he solved a complicated differential and integral calculus problems on Japanese television.

Kim entered university as a physics student at the age of three. Later at the 'ripe old age of seven', Kim was invited to the United States by NASA to study (I think he was invited because they suspected him of being an alien).

Hahaha.