Am 16.09.2011 11:24, schrieb Roan Kattouw: > For some applications, I use the technique of representing the 128 bit > of md5 or other checksums > > as base-62 character strings > instead of hexadecimal (base-16) strings.
> MediaWiki already uses a similar technique, storing SHA-1 hashes of > images in base 36. Was there a certain reason to chose base 36 ? Why not recoding to base 62 and saving 3 bytes per checksum ? base 16 = CHAR(32) md5 sum in hexadecimal base 36 = CHAR(25) base 62 = CHAR(22) using base 62 (upper and lower ASCII letters and digits) would save 3 bytes over base 36. if my calculator works correctly ;-)
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