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  • October 20, 2017 at 10:00 pm #18258
    Tarit Goswami
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    $$T_m= 17^{17^{17^{.^{.^{.^{17}}}}}} $$ (m times) ,Find the smallest n such that T_n,T_(n+1),T_(n+2) all have same last digit.

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