Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{14^{91}-1\over13}\] | 13 × 157 × 8108731 × 29914249171<11> × 28814088661742931457<20> × 1831232267609932496997868363<28> × 584366847068061307066945129899763321<36> |