Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 156: | \[{15^{156}-1\over14}\] | 25 × 132 × 53 × 79 × 113 × 157 × 211 × 241 × 1249 × 3877 × 11909 × 15289 × 15601 × 16433 × 18617 × 20749 × 157483 × 5557501 × 16655159 × 30313817 × 151747597 × 1539711288259<13> × 12833766874934773<17> × 606451512892729597861<21> × 3230061048592350229141<22> × 45559363632313971113220889213<29> |