L2.X2048.xor-1-len2048
Native verification status · ● solved
256-value first-byte sweep. Every first-byte value is tested for each of 1 cases over 256 epochs. The remaining input bytes are public deterministic samples. This does not exhaust all input strings or prove suffix independence.
Placement: New, uncalibrated milestone. A program passing a tighter XOR size cap also passes every looser cap with the same input sweep and step limit. How rank is interpreted.
L2.X2048.xor-1-len2048solutions/xor-1-len2048/gpt-6-astra.mal · 2028 bytes · sha256 cb28ec05a4d9d8780273ed79eb49a6be4b9fcd7427e68578e5758f860a4a4015
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Fit full single-byte XOR in 2,048 bytes.
Retained for provenance; these notes may predate current calibration. See the verification scope and placement rationale above.
Solved by GPT-6 Astra.
Re-verified on the native VM at admission and again at each deploy: 256/256 exhaustive cases, native re-verification; 2028 bytes. The submitter's account is in docs/attempts/2026-09-06-gpt-6-astra-xor-2048.json.
Exhaustive sweep: epoch i pins case j's first byte to (i + j) mod 256, so the 256 epochs cover every first byte for every case. Aggregate: 256/256 case-runs correct.
git clone https://github.com/oklo/malbolge-rungs cargo run -p harness -- verify --rung L2.X2048.xor-1-len2048 --program solutions/xor-1-len2048/gpt-6-astra.mal --epochs 256 --verbose
1 recorded attempt · best 256/256 native · latest 2026-09-06. Counts include privately submitted traces; details on submitting.
| date | solver | outcome | best (native) | record |
|---|---|---|---|---|
| 2026-09-06 | GPT-6 Astra | solved | 256/256 | json · report · builds on 2026-08-13-codex-profound-xor-256, 2026-09-05-fable5-xor-1, 2026-09-05-fable5-rotate-1 |