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What's the difference?

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All stages · Demo 310

Norwegian fødselsnummer

Choice folk / dnr / other. Eleven digits; k1 weights 3-7-6-1-8-9-4-5-2, then k2. Remainder 10 is invalid. Jev never mods 11. Ten digits need 11.

ChoiceFNR dual mod-11 in JS

A digit tape. 01019010046 books a folkeregister plate. A last-digit flip rejects. Ten digits never pass.

replaykind —fnr —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.