Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 142: | \[{18^{142}-1\over17}\] | 19 × 569 × 5113 × 171677613761<12> × 23821298356519<14> × 1206599617106390561<19> × 8313279867213693856690162577<28> × 99988492874568924239703307744649<32> × 404888252726379587195529885794129<33> × 11360704486867123771415523819277051<35> |