Levent Alpöge may have just dropped a solution to the smallest open Hadamard case (668) as an obfuscated shell script

Reddit r/singularity News

Summary

Levent Alpöge has apparently used Claude to construct a 668x668 Hadamard matrix via an obfuscated shell script, potentially resolving the smallest open Hadamard case and all 12 unresolved orders below 2000, pending verification.

Original tweet He did it with Claude again. https://x.com/__alpoge__/status/2087504790435840207 This looks much more significant than the image initially suggests. The tweet contains an obfuscated shell script + a huge +/- payload. Decoding it produces a 668×668 matrix with entries ±1. 668 is important because it is the smallest order for which no Hadamard matrix is currently known. Finding one means finding H such that: HHᵀ = 668I I decoded the payload and checked the resulting 668×668 matrix computationally. It satisfies the condition exactly, every pair of distinct rows is orthogonal, with zero errors. But it gets weirder. The script appears to contain constructions for: 668, 716, 892, 1132, 1244, 1388, 1436, 1676, 1772, 1916, 1948, 1964 Those are exactly the 12 previously unresolved Hadamard orders below 2000. This does NOT prove the full Hadamard conjecture, and obviously this needs proper independent verification / mathematical explanation. But if the constructions all check out, someone may have just wiped out every remaining unknown Hadamard order below 2000 in a fucking cursed sed script.
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