4711
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The semiprime 4711 is the brand name of the original eau de cologne (Eau de Cologne & Parfümerie Fabrik Glockengasse), known for its secret citrus-lavender blend. Note that the absolute difference in its two prime factors equals the number of the beast. [Currey]
Submitted: 2016-04-23 21:12:08; Last Modified: 2026-01-31 03:24:50.
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