Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 500: | \[{31^{500}-1\over30}\] | 26 × 53 × 11 × 13 × 37 × 41 × 101 × 181 × 251 × 1601 × 1901 × 2251 × 4951 × 17351 × 21821 × 129001 × 227501 × 489001 × 1387501 × 4726301 × 12181751 × 13277801 × 92253001 × 4707206941<10> × 5637075001<10> × 20235942281002951<17> × 74770514303869505101<20> × 34869488656026169655830328179287001<35> × 3221875713010580184612256701786070501<37> × 281887891699576309494931758688962111082311886906752520001<57> × 617544845080849356257013429212774138527171353455186666026135501<63> × 60784645530726128834644568059533430352763751303806751750175914955374975926945250941616689737851657986683559549634685640837049829799674483257176751<146> × [233226604219254153744109148676291724210608534055872648596802408290429277383692645392089961621714299295297958962966473444288891773091647827138615297996347996400921666228750794864060169468069362046828075050083290302748045153343529561697449391159091640689819154926001<264>] |