Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 308: | \[{20^{308}-1\over19}\] | 3 × 72 × 23 × 29 × 71 × 89 × 197 × 401 × 827 × 10529 × 14561 × 32719 × 3067373 × 1424354653 × 170770770413<12> × 424016563147<12> × 6881957521693<13> × 10778947368421<14> × 11591111347512862858060061<26> × 51031806936058729981614877<26> × 2197422056016072681684469182449<31> × 94492701984716091424823399007224633473246602866536721<53> × 1210567578891427492816561347489923627502617025084966049153058402099173120000021<79> × 3874028800793090532612773220415174889394636166967266507390854781580338580015319318289290703369<94> |