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MathNet 2019-part-06 — 184 problems (EN–VI) Question 151

Math Olympiad Vault · MathNet 2019-part-06 — 184 problems (EN–VI)

Question 151

Determine whether there exists a finite set $S$ of prime numbers such that, for every integer $n \ge 2$, the number
$$
2^2 + 3^2 + \dots + n^2
$$
is divisible by some prime number $p \in S$.