If these people lived before the early 1900's that means their IQ score is projected. If they lived after that period than it most likely is their real IQ without any projections. If you know of anyone else that should be on this list you should make a comment or add it to the end of the list and I will rearrange the list.
http://www.ranker.com/list/highest-iq-scores-ever-recorded-and-projected/stokified,
Albert Einstein
225 His ideas are pillars of modern day physics.
Nikola Tesla
230-320 Most important inventor of all-time.
William James Sidis
250-300 Graduated with cum laude honors at Harvard at age 16.
Adragon De Mello
400 Graduated college at age 11.
Ainan Cawley
263-349 Passed Chemistry- O level at 7 years old.
Marnen Laibow-Koser
268 Computer Science genius.
K. Vishalini
225 CCNA (Cisco Certified Network Associate). Youngest ever certified CCNA with 90%.
Carl Gauss
250-300 Referred to as prince of Mathematicians in 1800s.
Andrew Magdy Kamal
232 Born in 1996 with Aspergers. Has theories of curing Cancer and Parkinson's.
Michael Kearney
325 Graduated college at age 10.