threelonmusketeers@sh.itjust.works to Math Memes@lemmy.blahaj.zoneEnglish · 13 days agoJohn Conway proves that 91 is the smallest number which looks prime but isn'twww.youtube.comexternal-linkmessage-square17fedilinkarrow-up1106arrow-down13
arrow-up1103arrow-down1external-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 · 13 days agomessage-square17fedilink
minus-squareBigDanishGuy@sh.itjust.workslinkfedilinkEnglisharrow-up6arrow-down4·12 days ago9+1 = 10, therefore 91 is divisible by 10 and is not a prime … QED, I guess
minus-squarehumorlessrepost@lemmy.worldlinkfedilinkEnglisharrow-up1·12 days 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.