Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 198: | 33 × 7 × 23 × 67 × 127 × 199 × 307 × 421 × 661 × 859 × 38149 × 69481 × 3049927 × 64008001 × 424016563147<12> × 10778947368421<14> × 14121717629581<14> × 175462044485240500219<21> × 922369047390135978639798529<27> × 12992593428389191667383293584162419<35> × 445857960156220211502282409711073343103021<42> × 1250113089825917214320490810908618794473831378005569<52> |