Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 330: | \[{20^{330}-1\over19}\] | 32 × 7 × 112 × 23 × 31 × 61 × 67 × 127 × 251 × 331 × 421 × 661 × 859 × 991 × 3001 × 38149 × 79531 × 152381 × 261451 × 2209901 × 3049927 × 26876632021<11> × 68047805101<11> × 424016563147<12> × 10778947368421<14> × 14121717629581<14> × 45302186062321<14> × 1373430941347081<16> × 2571413672161047121<19> × 175462044485240500219<21> × 504390604852567932181<21> × 167103718909962607171187251<27> × 5248515081374779239217243799310421<34> × 301448967063447759597770509975821331<36> × 11544868483876542417134734645670674427914239932800021<53> × 166222939261640687096675468865093740063962868584656960638665836803521<69> |