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threelonmusketeers@sh.itjust.works to Math Memes@lemmy.blahaj.zoneEnglish · 8 months ago

John Conway proves that 91 is the smallest number which looks prime but isn't

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John Conway proves that 91 is the smallest number which looks prime but isn't

www.youtube.com

threelonmusketeers@sh.itjust.works to Math Memes@lemmy.blahaj.zoneEnglish · 8 months ago
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  • smeg@feddit.uk
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    8 months ago

    Surely it’s 1? Looks prime, and some people will even argue that it is!

    • mvirts@lemmy.world
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      8 months ago

      Its only factors are 1 and itself after all

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