Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 341: | \[{20^{341}-1\over19}\] | 311 × 11161 × 23189 × 47059 × 360779 × 1015499 × 1646101 × 340037881769<12> × 10778947368421<14> × 29940972561919<14> × 581740080393079<15> × 615098743632686039<18> × [262824650720092343258813470348228163251350973166521911327456673525795098066898643959017136036273160715201010874450133737412312230657856788145784889838755308038538890068415930140392658710839952413820946448889978699530442761374375638441570177767183933266659331675577018610153722233224997800517180746694079801822224397292670310455282682364771<339>] |