Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 187: | \[{31^{187}-1\over30}\] | 23 × 397 × 617 × 1871 × 150332843 × 751670559138758105956097<24> × 21456396540160141838908865626502780875977388849762498021756115870151291586776108565721071342055989763465195522107778580483920819437613636331636258886723467893662053111240783939105090415542575670234934093807735600629586208732240038656431<236> |