Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 204: | \[{31^{204}-1\over30}\] | 26 × 3 × 72 × 13 × 19 × 37 × 103 × 331 × 613 × 1429 × 922561 × 1399577 × 1961163283 × 2157381990573913<16> × 224499664484159761<18> × 352607991704483661973<21> × 2796214962413636917873<22> × 6841661642646463343047<22> × 751670559138758105956097<24> × 1682325489672499143634073<25> × 195333779873358973907838097<27> × 261116663697161542351918133573442849307<39> × 420618321325123865137773089105095212051907948657444957<54> |