Template:Today in Math History for July 11

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July 11, 1832 Charles Lutwidge Dodgson, better known as Lewis Carroll, is baptized.
July 11, 1913 Zygmunt Janiszewski delivers a lecture on the axiom of choice in Lvov.
July 11, 2010. GIMPS announces that $\scriptstyle 2^{20996011}-1\,$ is indeed $\scriptstyle a(40)\,$ of A000668 (also confirming the corresponding terms in A000043 and A000396), since all numbers between 13466917 and 20996011 exclusive had then been shown to produce composite Mersenne numbers.

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