heh.. they're commonly known as 'JAPHs' (Just another Perl hacker). Idea is to write a small code snippet as obfuscated as you can up to 4 lines (designed for .sigs) than when run will print 'Just another Perl hacker'. This one's pretty basic but some are great and AFAIK, an extension from the old C obfuscation challenges.
This one breaks the 2 rows of numbers up into chunks of 6 and stores each chunk of 6 as in an array and each chunk is then divided by 3572 which'll give you an ASCII code, converted by the chr() function into a letter
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I read a post on another forum where someone said that Perl code looked the same both before and after RSA encryption heh.. so I decided to write that for fun
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Regards,
Ian