Which one of the following groups of numbers include all prime numbers 3112331 23515 7176367 131123?

To identify which of the given numbers are prime, we need to check each one for factors other than 1 and itself. Upon examination, 3112331 and 7176367 are prime numbers, while 23515 and 131123 are not (they have divisors). Therefore, the group containing all prime numbers from the list is {3112331, 7176367}.