Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 170: | \[{31^{170}-1\over30}\] | 25 × 5 × 11 × 41 × 103 × 17351 × 21821 × 108971 × 232122807601<12> × 391206807721<12> × 21736504684553261<17> × 6841661642646463343047<22> × 751670559138758105956097<24> × 292415865518548212725264181682005402545390163298379652017348311<63> × 1245141934790891820186929953481042617404430460698797792065080730109689040939824529361<85> |