Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 500: | \[{15^{500}-1\over14}\] | 25 × 11 × 31 × 101 × 113 × 251 × 1531 × 1801 × 3001 × 4931 × 9001 × 19421 × 46751 × 115201 × 131381 × 9555151 × 34800625873379851<17> × 7112705843777290751<19> × 488319615232404540001<21> × 50393753299364350488001<23> × 2718938036486102674173251<25> × 5276658969583784209292870346873232901<37> × 8352386699057186473887658525944222924001<40> × 486760481984278426711796938923626732914176082728645150461433974304119092138501<78> × 5957346676587042681973111523596421999420361763994295377295742004155127441032747687666014001<91> × [24866472331633529481165601363566233034709841794043447286543843701198729449237955686498220016954193144893556523449225972877479352390729523813561249192810603297743578781161854957336960001<185>] |