Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 158: | \[{6^{158}-1\over5}\] | 7 × 317 × 5531 × 2832941 × 1147240288157<13> × 99687312908749681<17> × 26283825237209622143<20> × 197531251446059329471533015409<30> × 8592319153827988586815914947213<31> |