Find 10 composite numbers in a row? Easy. 100? Still doable. A million? Yep. This proof, explained by drtrefor, shows how. If you like the idea of wrestling with ideas of infinity, and learning about more of Dr Trefor’s favourite mathematical proofs, take a look at his online course with oxlifelonglearning by searching ‘The Art of Proofs Dr. Trefor.’ #oxforduniversity #maths #primenumbers #mathematics