Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
121: | \[{23^{121}-1\over22}\] | 112 × 727 × 81071 × 163351 × 3937230404603<13> × 1628747138359818166031<22> × 3575146747010298454102355292978756472363906561245901759131896920996651922955094179692578788959314122449629675238651<115> |