# NanoProof: Open and Efficient Automated Theorem Proving in Lean 4

Source: https://arxiv.org/abs/2610.11605
Published: 2026-10-08
Status: unreviewed source report

## Source excerpt (up to 25 words)

> We introduce NanoProof, to our knowledge the first factorized execution-guided theorem prover in Lean 4 whose training data, extraction tooling, training pipeline, and weights are

## Review question

Inspect the formal statement, imported axioms, admitted lemmas, checker version and correspondence with the informal theorem. A successful compiler exit alone does not prove that the intended question was formalized.

No independent proof check or claim of peer review.