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1876 in science
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==Mathematics== * [[รdouard Lucas]] demonstrates that 127 is a [[Mersenne prime]], the largest that will be recorded for seventy-five years.<ref>{{cite web|title=The Largest Known Prime by Year: A Brief History|first=Chris|last=Caldwell|url=http://primes.utm.edu/notes/by_year.html|accessdate=2011-12-30}}</ref> He also shows that the Mersenne number 2<sup>67</sup> โ 1, or M<sub>67</sub>, must have [[Factorization|factors]].
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