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Thread: This file contains is call ?

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    This file contains is call ?

    AMillionRandomDigits.bin from https://marknelson.us/posts/2012/10/...turns-ten.html , the contains is call what ? why can't read it?

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    Administrator Shelwien's Avatar
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    Obama (26th May 2019)

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    Quote Originally Posted by Shelwien View Post
    i mean the contain words is what?why like alien words?

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    Quote Originally Posted by Obama View Post
    i mean the contain words is what?why like alien words?
    It´s a binary file. They aren´t words. Try to open for example JPG file in notepad and you will see the same results - "garbage". This cannot be compressed at all in this mode, because if you alter even one character, saves the file, insert the same character into corresponding position, saves that, you wouldn´t be able to open it at all nor reconstruct it back losslessly.

    As for the particular file, try to compress directly only AMillionRandomDigits.txt

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    Obama (26th May 2019)

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    Quote Originally Posted by Obama View Post
    why like alien words?
    Open binary files with a HEX editor like:
    https://www.hhdsoftware.com/free-hex-editor

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    Obama (26th May 2019)

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    Quote Originally Posted by CompressMaster View Post
    It´s a binary file. They aren´t words. Try to open for example JPG file in notepad and you will see the same results - "garbage". This cannot be compressed at all in this mode, because if you alter even one character, saves the file, insert the same character into corresponding position, saves that, you wouldn´t be able to open it at all nor reconstruct it back losslessly.

    As for the particular file, try to compress directly only AMillionRandomDigits.txt
    Why the guy want us compress and decompress this file ?

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    Quote Originally Posted by Obama View Post
    Why the guy want us compress and decompress this file ?
    Because this is a compression contest.

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    Obama (27th May 2019)

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    Administrator Shelwien's Avatar
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    To get people to understand that they can't really compress random data.

    Many people don't understand logic or mathematics, but still make bold claims about data compression.
    So Mark Nelson proposed a technical method to verify these claims.
    His original message with the challenge was posted in 2002, and somehow nobody was able to demonstrate a working random compression scheme with it,
    although we get 2-3 such claims every year.

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    Obama (27th May 2019)

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