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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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           | Description | 
           English: Every pixel here represents a number in the range 1 to 76,800. If the pixel is black, the number it represents is prime. If the pixel is white, that number is not prime. 
            So for example, the white pixel in the upper-left represents "1", which not prime. The next two black pixels to the right in the same row represent "2" and "3", which are prime. 
            For any pixel, the number it represents is given by 
            
             - number = column + (row-1)*320
 
             
            where column runs from 1 to 320, and row from 1 to 240. See the  list of the 100,008 primes | 
          
          
           | Date | 
           2007-03-09 (original upload date) | 
          
          
           | Source | 
           Transferred from  en.wikipedia; transfer was stated to be made by  User:Aushulz. | 
          
          
           | Author | 
           Original uploader was  JabberWok at  en.wikipedia | 
          
          
           Permission ( Reusing this file) | 
           
             This image is in the  public domain because it is ineligible for copyright. 
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        Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
            | 
          This file is ineligible for  copyright and therefore in the  public domain, because it consists entirely of information that is common property and contains no original authorship. | 
         
        
        
       File usage
       
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