Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[{20^{203}-1\over19}\] | 292 × 59 × 71 × 929 × 10789 × 32719 × 143609 × 466307299 × 71353204641689<14> × 416342986893831527394682060819665340624809379247669<51> × 143898718736967326644103759009524395515229793952770451037038868341<66> × 204576949613262569842922274426200752428775161825247204534907214162447891577218079001650264666147359641<102> |