Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 447: | \[{8^{447}-1\over7}\] | 73 × 93871 × 19779751 × 34029217 × 87980329 × 400482858239983<15> × 86656268566282183151<20> × 8235109336690846723986161<25> × 77360147414126613793604276000882862826456964681059491988849<59> × 72751284869088788795301631728906362894695299875729701287430721838248329952225963533888951<89> × 10505149579279821681065340931006184372510615069725994892524670865250553224629401815233232026685293063904698403272503313079664608631664645408013558964400878220884351031<167> |