Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 163: | \[{6^{163}-1\over5}\] | 653 × 2378523250342970947582043555610171717174452063<46> × 888102772526021838488123845334486037375412519645053051472793437455099303804577<78> |