Sexy Primes
August 23, 2019
A sexy prime is a prime number p for which p + 6 is also prime. Such primes are called sexy because the Latin word for six is sex.
Your task is to write a program that counts the sexy primes between one billion and two billion. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.
Programming Praxis 