Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
80: | \[{23^{80}-1\over22}\] | 26 × 3 × 52 × 17 × 31 × 41 × 53 × 61 × 211 × 241 × 941 × 3697 × 5081 × 139921 × 272341 × 292561 × 623009 × 7249841 × 147190628299441<15> × 1206964869343609001<19> × 146239626404410677041<21> |