Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
236: | \[{3^{236}-1\over2}\] | 23 × 5 × 3187 × 14425532687<11> × 489769993189671059<18> × 1108439448677340328268341<25> × 19966781110160346782368664772328944885905284750420567849<56> |