Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 207: | \[{13^{207}-1\over12}\] | 32 × 61 × 139 × 1381 × 10903 × 1609669 × 39674449 × 1598219928127<13> × 282244620282733<15> × 2519545342349331183143<22> × 22271867346104672186904295489<29> × 17305228489237445144548693353643604105181677611142894535306465838651769631496774253458273376899375358921422700557686798764757223<128> |