Factors and Multiples

Question

The formula n² + n + 17 will give primes for n = 1, 2, 3, ..., 16 but not for n = 17. Which of the primes less than 175 are given by this formula? Write the primes in increasing order.

Answer 1

n=1, prime=19

n=2, prime=23

n=3, prime=29

n=4, prime=37

n=5, prime=47

n=6, prime=59

n=7, prime=73

n=8, prime=89

n=9, prime=107

n=10, prime=127

n=11, prime=149

n=12, prime=173