tables > factorial > f2-1

n!! - 1

Table

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

* 278: \[278!!-1\] 257 × 25646347 × [10166997409983660555837020799715229734280763323249694207612679781723771483699350762599201404785557570712312968419428111726705571699919035597865464697197184930242132115918675888458455582308957197230735418135652217383109157925802193584078534989914502244811853142615605695581<272>]

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