Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 219: | \[{31^{219}-1\over30}\] | 3 × 331 × 877 × 30223 × 122840087453<12> × 197340338942587<15> × 833039147209543<15> × 404318326024801439191676313735836288644493580299053616879363447<63> × 62930105226949493499619448853707760461445190101986342042375742134384685491772340126023871650642234449426253850235593396201520966312617688016120464118125812581324633660008391096000603926702295243559855039869608293<212> |