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before https://web.archive.org/web/20071109215242/http://unenumerated.blogspot.com:80/2005/12/bit-gold.html https://web.archive.org/web/20071109215242/http://unenumerat... after https://web.archive.org/web/20091017171846/http://unenumerated.blogspot.com:80/2005/12/bit-gold.html https://web.archive.org/web/20091017171846/http://unenumerat...