Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 149: | \[{15^{149}-1\over14}\] | 1789 × 2683 × 1849091 × 616786991 × 1631123563 × 138247790441387135347185161237718510731795220800809634590036977717496541091909191423362761150644661383353518068327295364290936603799625322432481<144> |