ISL 1970 Problem 27

Find a $n\in\mathbb{N}$ such that for all primes $p$ , $n$ is divisible by $p$ if and only if $n$ is divisible by $p-1$ .

Dataset text AI-MO AoPS. Quoted with source.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.