Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 262: | \[{31^{262}-1\over30}\] | 25 × 263 × 787 × 141481 × 436231 × 50985878321669<14> × 4386282905793741721<19> × 492720843616088468400497945831939180277753459209351199481<57> × 113742101847199438523030804493161724658087982584430612950057555043036672933<75> × 146289792979207939375524919419918934151120010042549262694567070703940755384221047536318725992969654207<102> × 242585406730506165131491575784491109922965362651339569542053097118441665907267066694750490401054186043459919<108> |