Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 405: | \[{8^{405}-1\over7}\] | 31 × 73 × 151 × 271 × 487 × 631 × 2593 × 23311 × 71119 × 262657 × 348031 × 537841 × 97685839 × 49677578641<11> × 16753783618801<14> × 49971617830801<14> × 192971705688577<15> × 11096527935003481<17> × 3712990163251158343<19> × 17645665556213400107370602081155737281406841<44> × 660657672518832002413997900375962405769331474918483722521<57> × 35587730061651572813645091915392646587500419941226352943003407923114622009461764361082185123933692044046427168174533156579030041<128> |