Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 250: | \[{15^{250}-1\over14}\] | 24 × 11 × 31 × 251 × 1531 × 4931 × 46751 × 9555151 × 34800625873379851<17> × 7112705843777290751<19> × 2718938036486102674173251<25> × 8352386699057186473887658525944222924001<40> × 486760481984278426711796938923626732914176082728645150461433974304119092138501<78> × 5957346676587042681973111523596421999420361763994295377295742004155127441032747687666014001<91> |