7666591

This number is a prime.

Single Curio View: (Seek other curios for this number)

7666591 is the smallest prime primitive factor of 10⁵⁵⁵⁵⁵ - 1. Also smallest prime p such that 1/p has repeating decimal expansion of period 55555. [Zhining]

Submitted: 2026-08-17 14:59:52; Last Modified: 2026-08-17 15:24:33.

Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean