Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 243: | \[{18^{243}-1\over17}\] | 73 × 487 × 991 × 9721 × 23761 × 34327 × 253369 × 911737 × 1464049 × 4464073 × 27470503 × 205020559 × 906359383 × 7154907550543<13> × 1964508729666289645801020967<28> × 2317745463335260122632425120711<31> × 10906621034587987987076949169455727<35> × 1192070670617959473422926181872179917165924353207<49> × 1475268953368596278583483321710513350083193746874399008881953080277365480556429711<82> |