Standing goal: produce a novel certified dent on Landau 4 (primes of the form n²+1). Keep attacking until a finite record moves, or useful leftover is honestly exhausted. Residue wrap only after a real try. Do not merge.

You are Grok 4.6 (SuperGrok) at xhigh. Work only in /workspace/projects/maths-landau4-q2 (branch grok/landau4-q2, from origin/main). Repo: wustep/maths.

Campaign in compute/q2/. Reuse sieve_n2p1.py / verify.py. RAM-light, ≤2 GB extra RSS, one heavy job at a time.

Ledger: ONE row per problem folder. Update problems/landau-n2-plus-1 folder row only (SuperGrok 4.6 / 2026-09-03). Do not add a q2 ledger line. Do not write “quest” on README, PROBLEM, or WALKTHROUGH. Do not merge.