Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 229: | \[{13^{229}-1\over12}\] | 9986233 × 2092593361529545943<19> × 2168565645304958438443671755141<31> × 575701440347834996099797913453237773599541<42> × 293303135624601678361453076305242830809079039820211<51> × 13491905754438835695436891011379302136935183486390929359231868654881533638174161266032404705831641011092489<107> |