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Thread: Hexadecimal and factorial question

  1. #1
    Junior Member
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    Cleveland OH
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    Hexadecimal and factorial question

    Hello all,

    I am trying to find the last hexadecimal digit of a series of large factorials, but I'll start with 990! + 991! +...+1000!. I am trying to find the last hex digit of a larger sum than this, but I think all I need is a push in the right direction, because right now I am lost.

    Where would I even begin? I tried to convert 1000 to hexadecimal form -- 3E8 -- but that didn't seem to help me at all, or at least not as much as I thought it would.

    Any and all help is greatly appreciated.

    SY
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  2. #2
    Junior Member
    Joined
    Feb 2015
    From
    Cleveland OH
    Posts
    44

    Re: Hexadecimal and factorial question

    I was able to figure it out.

    Thank you,

    SY
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