tables > factorial > f2+1

n!! + 1

Table

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

* 253: \[253!!+1\] 29 × 21157 × 59357 × 3836471 × 1085947283 × 18423409853087<14> × 20415430829738239<17> × [25444276516062188261351855375409798737197068416237807037469190746957028924601085078689658769828751824321554449811970438294877813638189186885115652185101468227509338635539134189206669862835012023<194>]

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