Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{31^{180}-1\over30}\] | 26 × 32 × 5 × 72 × 11 × 13 × 19 × 37 × 41 × 61 × 181 × 271 × 331 × 577 × 2521 × 3637 × 17351 × 21821 × 25621 × 63901 × 81343 × 106291 × 922561 × 1529401 × 1536553 × 1538083 × 2065411 × 8728381 × 14398921 × 327412201 × 4707206941<10> × 304643210761<12> × 512616735577<12> × 880374069121<12> × 337048683633480845467801<24> × 300392264044249601502733598251<30> × 3062652058567421722695601733366295562873644660421771523821<58> |