Base 30 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{30^{68}-1\over29}\] | 172 × 31 × 53 × 103 × 137 × 409 × 613 × 7243 × 8093 × 565727 × 165849348647<12> × 404569958213<12> × 1727160261481<13> × 14053761296299261<17> × 10570676926829627653<20> |