tables > factorial > f2-1

n!! - 1

Table

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Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>

* 281: \[281!!-1\] 24 × 283 × 491 × [112979871114244873532248306771728509938320382486606519750192087950648215529819512085611197038129622247328031351423322587392883356717933009304486584941588581074170145602643342828660285532101434049638736434305715655407116496758632285113965750274126133597979058393763780636124180813<279>]

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