Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 215: | \[{31^{215}-1\over30}\] | 5 × 11 × 17351 × 146982701137<12> × 3049055684506560663410351046998584180840895763387409<52> × [34239241894392759200876997467995617180772682986467328648907296753371228241638233937556247602508177173518632257436595495497635109021639697316074752606220115645945685628284295010974081775497228518250456198399941464261178907273751969245585709025473269121<251>] |