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He was homeschooled by his mother and a cousin until age eleven, and then homeschooled by a tutor until entering [[Moscow University]] in 1837.

He was homeschooled by his mother and a cousin until age eleven, and then homeschooled by a tutor until entering [[Moscow University]] in 1837.

He co-authored a complete edition of Euler's 99 number theory papers, in a two-volume set published in 1849. In 1850, Chebyshev proved Bertrand's conjecture that there is always at least one prime between n and 2n, for n > 3. Chebyshev also made progress on proving the Prime Number Theorem.

He co-authored a complete edition of Euler's 99 number theory papers, in a two-volume set published in 1849. In 1850, Chebyshev proved Bertrand's conjecture that there is always at least one prime between n and 2n, for n > 3. Chebyshev also made progress on proving the Prime Number Theorem.