Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
54: | \[{13^{54}-1\over12}\] | 2 × 33 × 7 × 19 × 61 × 157 × 163 × 271 × 937 × 650971 × 904663 × 1609669 × 762615992953<12> × 57583418699431<14> |