Ivan Mikheevich Pervushin
Ivan Mikheevich Pervushin was born on January 21, 1827. See ranking, bio blurb, and everyone else born that day.
About Ivan Mikheevich Pervushin
Ivan Mikheevich Pervushin (Russian: Иван Михеевич Первушин, sometimes transliterated as Pervusin or Pervouchine) (15 January 1827—17 June 1900) was a Russian clergyman and mathematician of the second half of the 19th century, known for his achievements in number theory. He discovered the ninth perfect number and its odd prime factor, the ninth Mersenne prime. Also, he proved that two Fermat numbers, the 12th and 23rd, were composite. A contemporary of Pervushin's, writer A. D. Nosilov, wrote: "... this is the modest unknown worker of science ... All of his spacious study is filled up with the…