threelonmusketeers to Math [email protected]English • 10 hours agoJohn Conway proves that 91 is the smallest number which looks prime but isn'twww.youtube.comexternal-linkmessage-square16fedilinkarrow-up180arrow-down13
arrow-up177arrow-down1external-linkJohn Conway proves that 91 is the smallest number which looks prime but isn'twww.youtube.comthreelonmusketeers to Math [email protected]English • 10 hours agomessage-square16fedilink
It’s funny, but actually a good proof