Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[{25^{221}-1\over24}\] | 409 × 443 × 3061 × 4421 × 5227 × 27847 × 38923 × 351391 × 495041 × 41540861 × 305175781 × 466344409 × 123067090303<12> × 231452141519<12> × 510410130722343681961<21> × 183276094190104631834639<24> × 1436003589550079403417985191612889433318011249<46> × 5954120723086877446689864001520990199500692430959<49> × 112724166972118037845230138264683627950084289403279188216519809605870473314982904376247<87> |