Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 72: | \[{6^{72}-1\over5}\] | 7 × 13 × 19 × 31 × 37 × 43 × 73 × 97 × 541 × 577 × 1297 × 2467 × 3313 × 46441 × 55117 × 1678321 × 2478750186961<13> |