Let $A$ be the set of all odd integers $\ge 1$ not of the form $p+2^k+2^l$ (where $k,l\ge 0$ and $p$ is prime). Is the upper density of $A$ positive?

gpt-erdos · GPT-5.2 Pro + Deep Research · unverified

This is **still open** (as of the last publicly curated status updates in late 2025).

llm-hunter · codex 5.2 extra high, gpt 5.2, gpt pro 5.2 · unverified

5 LLM attack(s) recorded (codex 5.2 extra high, gpt 5.2, gpt pro 5.2); unverified.