Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
48: | \[{13^{48}-1\over12}\] | 24 × 3 × 5 × 7 × 17 × 61 × 157 × 1009 × 14281 × 28393 × 407865361 × 815702161 × 659481276875569<15> |