threelonmusketeers@sh.itjust.works to Math Memes@lemmy.blahaj.zoneEnglish · 4 months agoJohn Conway proves that 91 is the smallest number which looks prime but isn'twww.youtube.comexternal-linkmessage-square9fedilinkarrow-up14
arrow-up14external-linkJohn Conway proves that 91 is the smallest number which looks prime but isn'twww.youtube.comthreelonmusketeers@sh.itjust.works to Math Memes@lemmy.blahaj.zoneEnglish · 4 months agomessage-square9fedilink
minus-squareBigDanishGuy@sh.itjust.workslinkfedilinkEnglisharrow-up0·4 months ago9+1 = 10, therefore 91 is divisible by 10 and is not a prime … QED, I guess
minus-squarehumorlessrepost@lemmy.worldlinkfedilinkEnglisharrow-up1·4 months agoIn the right base, that might work.
9+1 = 10, therefore 91 is divisible by 10 and is not a prime … QED, I guess
In the right base, that might work.