Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{18^{180}-1\over17}\] | 53 × 73 × 11 × 13 × 19 × 31 × 372 × 41 × 61 × 73 × 181 × 229 × 307 × 457 × 601 × 991 × 2711 × 9041 × 15101 × 15121 × 16921 × 25309 × 34327 × 145501 × 313921 × 465841 × 558721 × 585721 × 828811 × 33388093 × 7804804801<10> × 11630180251<11> × 872666624341<12> × 8317058910008581<16> × 7414337897636419261<19> × 1614949986544027569856891<25> × 1338029376807245057016053427001<31> |