Question 104
a. Find all primes $p$ for which $\frac{7^{p-1}-1}{p}$ is a perfect square.
b. Find all primes $p$ for which $\frac{11^{p-1}-1}{p}$ is a perfect square.
b. Find all primes $p$ for which $\frac{11^{p-1}-1}{p}$ is a perfect square.
MathNet 2008-part-04 — 165 problems (EN–VI) Question 104
Math Olympiad Vault · MathNet 2008-part-04 — 165 problems (EN–VI)