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Problem #455: Let $q_1

Let $q_1

Problem Statement

Let $q_1<q_2<\cdots$ be a sequence of primes such that\[q_{n+1}-q_n\geq q_n-q_{n-1}.\]Must\[\lim_n \frac{q_n}{n^2}=\infty?\]
Categories: Number Theory

Progress

Richter [Ri76] proved that\[\liminf_n \frac{q_n}{n^2}>0.352\cdots.\]

Source: erdosproblems.com/455 | Last verified: January 15, 2026

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