Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 140: | \[{31^{140}-1\over30}\] | 26 × 5 × 11 × 13 × 29 × 37 × 41 × 71 × 181 × 281 × 7253 × 11971 × 13469 × 17351 × 21821 × 71821 × 106261 × 107941 × 319061 × 149269961 × 203633641 × 277739477 × 917087137 × 4707206941<10> × 9240957640390889951861<22> × 60427990638165876546967231<26> × 77890519715454496560396129461<29> × 1534835130260968837905730005181<31> |