Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 391: | \[{19^{391}-1\over18}\] | 277 × 2347 × 6257 × 10949 × 3044803 × 813038363 × 16497763013<11> × 1335495402823<13> × 7289453112691<13> × 99995282631947<14> × 12394192420072933542173377<26> × [248898116136405631661884637817267971729252972773586625196360127824342770436424356935570571421315844475093803806199322518951700886177287065131948532779716183889384176650082727376807228843129888045952888157590770560924201329862933890644878494761664449453595038795781729987552167538586756160815230809245989885485892619610762952812310705129418865429170000290682288247050868232970206283968394174575037<396>] |