Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 421: | \[{8^{421}-1\over7}\] | 614002928307599<15> × 1313310230653921<16> × 1160237874387344563207<22> × 96394828074288003368359<23> × 8819779591697258388298117725624832271141577326602771028307143781815455970700534027206522451123308835472505327249<112> × 28522672164622829627575030374030197153314069461150364225257286599127532180111709568670873139355789096228277709323585415475855701722016808524383796618317463083885708130104497747605732353998066087<194> |