Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 207: | \[{8^{207}-1\over7}\] | 47 × 73 × 79903 × 178481 × 262657 × 624456487 × 634569679 × 2232578641663<13> × 10052678938039<14> × 42166482463639<14> × 93747988411543<14> × 2751471927250675803997960029212747063792197831435631743363158238779139269787256021849179673077249<97> |