Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{19^{261}-1\over18}\] | 32 × 59 × 127 × 233 × 349 × 523 × 29989 × 1230181 × 1243579 × 1472041 × 2997499 × 20736451 × 24726398761<11> × 297003021451861<15> × 363517190354341<15> × 165049085515149863<18> × 1340588661158222617<19> × 25973343508375238720347<23> × 8680146187079648246848027<25> × 3724189776077488523566887122900810739568879108731201927856537<61> × 52890326382036157233366304009954977984098290818279768512940322088837128844889306673436021797043248879<101> |