Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 198: | \[{28^{198}-1\over27}\] | 32 × 192 × 232 × 29 × 37 × 67 × 127 × 199 × 271 × 757 × 2377 × 102547 × 262351 × 365773 × 444979 × 6077039 × 50545507 × 212170597 × 7351568071<10> × 540610746853<12> × 4376814093829<13> × 6715287557697371797<19> × 40605883588556366257<20> × 425141076149786955572181811<27> × 2476555609285131555768782061395066044002134437261<49> × 588059502384167741754689230237055517031269700136285805215376626148451<69> |