Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 193: | \[{13^{193}-1\over12}\] | 27281323 × 223486667 × 1468937560453708434469<22> × 7449947231961629266886007357190440768518917434848239959013<58> × 122352309264571064033919899300401533112321994434435097666641259050939276865635078034027810522009532104232152555914241873<120> |