Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 143: | \[{13^{143}-1\over12}\] | 23 × 53 × 419 × 859 × 18041 × 264031 × 1803647 × 133419712999<12> × 140748861026489<15> × 34436567931553789<17> × 39826785573214737241<20> × 422385642452919347685571782874181<33> × 3998259837097900188695659311992063431399<40> |