Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653

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Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653

The Decoder · Sep 3, 2026, 2:15 PM UTC

Anthropic's Claude Fable 5.1 appears to have cracked a centuries-old number puzzle that researchers considered unsolved. The article Claude Fable 5.1 decoded a centuries-old royalist message hidden in plain sight since 1653 appeared first on The Decoder .

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