Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 280: | \[{31^{280}-1\over30}\] | 27 × 5 × 11 × 13 × 29 × 37 × 41 × 71 × 113 × 181 × 281 × 409 × 1129 × 7253 × 11971 × 13469 × 17351 × 21821 × 71821 × 106261 × 107941 × 319061 × 149269961 × 203633641 × 277739477 × 917087137 × 4707206941<10> × 36004683284137<14> × 2331436501821281<16> × 152490484148901066281<21> × 9240957640390889951861<22> × 727422334085254365392641<24> × 60427990638165876546967231<26> × 77890519715454496560396129461<29> × 1534835130260968837905730005181<31> × 1740411887732051422580111846883613801<37> × 36512993988967353707194509407564229025599475953748878086244384549507444054395026768882090361<92> |