A System-Independent Digital Root Fingerprint in the Quran: Evidence from Thirteen Computational Experiments across Two Languages

Unified preprint integrating thirteen computational experiments from the d369 project. Supersedes Papers I–VI. We test whether the Quran carries a statistically significant digital root structure in the set {3, 6, 9} using two independent encoding systems (classical Abjad and the novel Special-6). Under Special-6, 51/114 Surahs (44.7%) yield digital roots in {3, 6, 9} (p = 0.007, Cohen's h = 0.234). A transformation map (G14) reveals a three-layer tree architecture with four self-preserving roots {1, 3, 6, 9} (p = 0.00013). Five control texts — Bukhari, Ibn Arabi, Mu'allaqat, Hebrew Torah, and shuffled Quran — all fall at or below chance. The Torah shows no G14 architecture (p = 0.068). Verse counts carry no signal (p = 0.652). All eight primary tests survive FDR correction. The fingerprint is text-specific, system-independent, order-dependent, content-borne, and indivisible across 114 Surahs. No theological claim is made.