Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[{12^{221}-1\over11}\] | 443 × 477517 × 2693651 × 9640021 × 20369233 × 74876782031<11> × 52016377765223<14> × 141523296304179193<18> × 27267433046893619404631197<26> × 2767487366128813243478189568387004020073<40> × 616355151311787257313919734345683902030597388854044781586173536787125415678174571289852426432936677593<102> |