Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 179: | \[{15^{179}-1\over14}\] | 359 × 1433 × 110623 × 9731021913201274253763109652494562548887330826521672973095546591640270124093<76> × 427427847665120694327361459522697478963013567346791909550262743162293322889926482571764406325935897321334160937610099114677<123> |