Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[{31^{266}-1\over30}\] | 25 × 191 × 571 × 11971 × 14251 × 71821 × 3293879 × 917087137 × 775559048587<12> × 88770666332610762169<20> × 2611420465612378154239<22> × 3545592640701962728192781<25> × 6615999805162252631529700657218371717794350611836567<52> × 2036388914420022444920155074139141488540257514275002112139691567<64> × 6877111245673259861979736656307007619797173441169043461812223934009623<70> × 22009599606722820377321592030269006572769075024025398439477709228249757284067962377156179182208149<98> |