Erdős Problem 1070

### What is the conjecture

https://www.erdosproblems.com/1070

Let $f(n)$ be maximal such that, given any $n$ points in $\mathbb{R}^2$, there exist $f(n)$ points such that no two are distance $1$ apart. Estimate $f(n)$. In particular, is it true that $f(n)\geq n/4$?

Status: open

### Choose either option
- [ ] I plan on working on this conjecture
- [x] This issue is up for grabs: I would like to see this conjecture added by somebody else

Start by reading the conjecture and its open status at https://www.erdosproblems.com/1070, then inspect the formal-conjectures repository for comparable Erdős problem entries. Done means adding a Lean formalization of Problem 1070 to the collection.

Written by the indexing model from the issue text.