Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 405: | \[{18^{405}-1\over17}\] | 73 × 31 × 41 × 271 × 487 × 601 × 991 × 2711 × 23761 × 34327 × 253369 × 558721 × 1464049 × 2293111 × 4464073 × 27470503 × 157538228874391<15> × 19604926044098138791<20> × 2267163273850729470001<22> × 550797593658000576635951641<27> × 1964508729666289645801020967<28> × 1338029376807245057016053427001<31> × 2317745463335260122632425120711<31> × [13767690750374521194673752052240300241961953698738800031895486699449089635849299560951424140049492576249099476051409045877284683555920907707957596881144640580039254211386797562505682068058999468581249948956378517480725476946725148354600577617114103005354314910880759808001<272>] |