3 is prime, 5 is prime, 7 is prime, 9 is a paradox; as is a paradox why the number 1 is… — Bertrand Russell Copy Share Image
Primes are the important main ingredient of numbers, for every number is either a prime or a product of primes. — Shakuntala Devi Copy Share Image
“The rule for working out prime numbers is very simple, but no one has ever worked out a simple formula for telling… — Mark Haddon Copy Share Image