this post was submitted on 22 Sep 2024
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Math Memes

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John Conway proves that 91 is the smallest number which looks prime but isn't (www.youtube.com)
submitted 1 month ago by threelonmusketeers@sh.itjust.works to c/mathmemes@lemmy.blahaj.zone
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[โ€“] smeg@feddit.uk 4 points 1 month ago (1 children)

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

[โ€“] mvirts@lemmy.world 4 points 1 month ago

Its only factors are 1 and itself after all