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I was a Professor of Mathematics and Historian at St Petersburg, then moved to Moscow to tutor Tsar Peter II.

I spent a considerable part of my life traveliing around Europe, interacting with famous mathematicians such as Leibniz, several of the Bernoulli family, de Moivre, and Hermann.

My area of expertise was number theory, motivated by correspondence with Euler.

I am best remembered for my conjecture, made in a letter to Euler in 1742 and still unsolved, that every even integer greater than 2 can be represented as the sum of two primes (e.g. 12=5+7).

Goldbach also conjectured that every odd number is the sum of three primes (e.g. 13=3+3+7).

I made other contributions (now forgotton) in number theory, in the areas of infinite sums, the theory of curves and the theory of equations.

Answer: Christian Goldbach (1690-1764)