BD × AI LAB · 8Z-RP
Current verified project evidence · 11 September 2026

nu3496
96,780

DEV2.3 and DEV2.4 currently stand at the same verified length on the official 3,496-city Nicaragua instance: 96,780 versus certified optimum 96,132. The gap is 0.674073%, or 648 length units.

96,780current project best
0.674073%gap to optimum
648units above optimum
3,496cities
DEV2.3 · donor

Healthy run, genuine plateau

Current evidence: cycle 19 / P5, bounded GENI/subtour/LK-chain micro-surgery, improve-only acceptance, k=30. The global progression reached 96,793 on 1 Sep, 96,784 on 2 Sep, 96,781 on 3 Sep and 96,780 on 5 Sep. No newer global best is present in the supplied extract.

next 0.50% milestone: 96,612 · 168 units away

DEV2.4 HF3 · successor/control

Tied donor after 318,291 proposals

DEV2.4 also stands at 96,780. The strict hybrid path was physically exercised: GPU affinity/candidates/disagreement/distance/move deltas plus Rust candidate 2-opt, LZ76 and Or-opt relocate are recorded. Independent validation is PASS.

current branch: C1_DEV23_P1_EXT_K12 · strict hybrid GPU+Rust

Current conclusion: DEV2.4 has not yet demonstrated superiority over DEV2.3. The tie is still valuable: it preserves a matched donor/successor hard-tail comparison and confirms that the current incumbent survives the newer strict hybrid path.
Historical provenance remains historical. The main 8Z-RP narrative still contains earlier completed milestones such as 96,793. Those dated achievements are not errors; this page is the live/current layer that supersedes them for current status.
Why six arenas? →Open 11 Sep receipt →Main research narrative →