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Problem #383: Is it true that for every $k$ there are infinitely many...

Is it true that for every $k$ there are infinitely many primes $p$ such that the largest prime divisor of\[\prod_{0\leq i\leq k}(p^2+i)\]is $p$?

Problem Statement

Is it true that for every $k$ there are infinitely many primes $p$ such that the largest prime divisor of\[\prod_{0\leq i\leq k}(p^2+i)\]is $p$?
Categories: Number Theory

Progress

A positive answer to this would give an answer to the second part of [382]. Heuristically, the 'probability' that $n$ has no prime divisors $\geq n^{1/2}$ is $1-\log 2>0$, so standard heuristics predict the answer to this is yes.

Source: erdosproblems.com/383 | Last verified: January 14, 2026

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