91 Memes

The mathematical blasphemy here is enough to make any number theorist choke on their cereal. Our confident friend starts eating, thinking 91 is obviously a prime number (it's not even checking if it's divisible by anything?). Then the horrifying truth appears: 91 = 7×13. That moment when your mathematical intuition fails you spectacularly and you realize you've been living a lie. Twenty years of teaching and I still see students confidently declaring numbers prime without bothering to check divisibility rules. The audacity!

Finally, someone ranked the cool kids of number theory! The S-tier primes (2, 3, 7, 23, 83) are the mathematical equivalent of sitting at the popular lunch table. Meanwhile, poor 91 is that kid who desperately tries to fit in but everyone knows is just 7×13 in a trench coat. Notice how single-digit primes mostly get VIP treatment, while larger primes are relegated to the mathematical basement. This is peak number elitism - the smaller your digits, the cooler you apparently are. Next thing you know, mathematicians will be giving these numbers their own Instagram accounts and tracking which ones get the most followers. "Oh, you like 61? That's so D-tier of you."

Ever notice how some numbers just feel more prime than others? This meme perfectly captures that weird math intuition we all secretly have! The prime numbers between 80-100 are actually 83, 89, and 97 (with 91 being an impostor since it's 7×13). But that cat sitting there labeled "91" just looks so confident about belonging in the prime club! It's like when you're absolutely certain about an answer on a math test until the results come back and you realize you've been bamboozled by your own brain. Mathematics doesn't care about your feelings, unfortunately! 😂