fails:Prime.prime_division returns an array of a prime factor and a corresponding exponent
fails:Prime.prime_division returns an empty array for 1
fails:Prime.prime_division returns [[-1, 1]] for -1
fails:Prime.prime_division includes [[-1, 1]] in the divisors of a negative number
fails:Prime.prime_division raises ZeroDivisionError for 0
fails:"Prime.prime_division returns an array of a prime factor and a corresponding exponent"
fails:"Prime.prime_division returns an empty array for 1"
fails:"Prime.prime_division returns [[-1, 1]] for -1"
fails:"Prime.prime_division includes [[-1, 1]] in the divisors of a negative number"
fails:"Prime.prime_division raises ZeroDivisionError for 0"
