Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 213: | \[{13^{213}-1\over12}\] | 3 × 61 × 6959 × 12923 × 201499 × 8227339 × 39355159 × 5990431171<10> × 24385215615829<14> × 34078015035971503<17> × 504649541791910254264659793435883391598383106891<48> × 1016705137474747135476535700217615993757244294651630647<55> × 56573583882629131201397586942443243853379490390398336588076200421<65> |