Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
90: | \[{13^{90}-1\over12}\] | 2 × 32 × 7 × 11 × 19 × 31 × 61 × 157 × 181 × 271 × 937 × 2251 × 2411 × 4651 × 12601 × 30941 × 161971 × 1609669 × 28325071 × 19145097390154976011<20> × 2997534286720771645924621<25> |