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Lucas–Carmichael number
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==External links== * {{cite book |title=Unsolved Problems in Number Theory |edition=3rd |author=Richard Guy |publisher=Springer Verlag |year=2004 |chapter=Section A13}} * {{PlanetMath|lucascarmichaelnumber}} * {{cite web |title=Something special about 399 (and 2015) - Numberphile |url=https://www.youtube.com/watch?v=yfr3BIk6KFc |archive-url=https://ghostarchive.org/varchive/youtube/20211222/yfr3BIk6KFc |archive-date=2021-12-22 |url-status=live|website=YouTube| date=15 January 2015 }}{{cbignore}} {{Classes of natural numbers}} {{DEFAULTSORT:Lucas-Carmichael number}} [[Category:Eponymous numbers in mathematics]] [[Category:Integer sequences]]
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