9127

This number is a prime.

Just showing those entries submitted by 'Keith': (Click here to show all)

9127 is the largest 4-digit prime p with this property: p-1 and p+1 both have at least one prime with an exponent of 3 in their prime factorization. 9126 = 2 x 3^3 x 12^2 and 9128 = 2^3 x 7 x 163. [Keith]