Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 264: | \[{20^{264}-1\over19}\] | 32 × 7 × 13 × 23 × 67 × 89 × 127 × 401 × 421 × 661 × 859 × 12277 × 31177 × 34057 × 38149 × 72733 × 160001 × 315481 × 821113 × 1297693 × 3049927 × 7930693 × 170770770413<12> × 424016563147<12> × 6881957521693<13> × 10778947368421<14> × 14121717629581<14> × 40094590244240929<17> × 175462044485240500219<21> × 52124091373716479037097<23> × 46676296576275720360548386813<29> × 8052021825835726849770514382617<31> × 2319337073395211099785193201715600543319930172815691353433717713874941978820001433<82> |