Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{10^{75}-1\over9}\] | 3 × 31 × 37 × 41 × 151 × 271 × 4201 × 21401 × 25601 × 2906161 × 182521213001<12> × 15763985553739191709164170940063151<35> |