Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 214: | \[{31^{214}-1\over30}\] | 25 × 155094227749<12> × 28432105659771938587<20> × 4197143767373257492439<22> × 514419457217157248455884625163<30> × 6356129797099418302027715900116100293792438915954041290121612772353443842710595946161012042842306114452363<106> × 243928530080139774792221558118631895311172041692997210650831467511869988562186759196736422556762203089093648561624682313904751299<129> |