Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 420: | \[{31^{420}-1\over30}\] | 26 × 3 × 5 × 73 × 11 × 13 × 19 × 29 × 37 × 41 × 43 × 61 × 71 × 181 × 211 × 281 × 331 × 421 × 2521 × 6301 × 7253 × 11971 × 13469 × 17351 × 21821 × 25621 × 71821 × 106261 × 107941 × 319061 × 922561 × 1529401 × 149269961 × 163598989 × 203633641 × 277739477 × 327412201 × 917087137 × 4707206941<10> × 13454000701<11> × 304643210761<12> × 880374069121<12> × 2813432694367<13> × 4038949965541<13> × 18396393590821<14> × 350121327433921<15> × 550469850411853<15> × 939903457569889<15> × 9240957640390889951861<22> × 60427990638165876546967231<26> × 39849234924648425393072876341<29> × 77890519715454496560396129461<29> × 1534835130260968837905730005181<31> × 4303134368687145997467938682848881<34> × 23707462166621201930562854073708336673561<41> × 148003138237233879617838239028930780360274246534669873111046976884082694136145963155735560271756563921488609833176262257561448042373730800867841<144> |