Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 171: | \[{31^{171}-1\over30}\] | 32 × 331 × 571 × 3637 × 7639 × 14251 × 81343 × 49267837 × 36068660903683<14> × 88770666332610762169<20> × 1716439847900062900800798410166938893<37> × 2368562559008917184473315386430964446049509799210734488365584887775209479876236065043940219937663830684002061294348835674729152634690712733979130739155733<154> |