Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 500: | \[{28^{500}-1\over27}\] | 54 × 11 × 29 × 61 × 101 × 151 × 157 × 251 × 14561 × 15101 × 53951 × 84961 × 106801 × 245251 × 637421 × 2606251 × 32861501 × 67643801 × 6813064001<10> × 7984305701<10> × 192184659301<12> × 1606876519751<13> × 10477992868501<14> × 155389757939666251<18> × 360728480233546501<18> × 3250144890260318201<19> × 222929435014083414901<21> × 3192292264490416526039188001988268492317727208247565940529255337832881582287841880647286039488134957106578095721751<115> × 1599000960085924476472613473719992411738225991261539629819839771552618469753882940656168305718116566993734075537931251<118> × 5403016130462290177189480043499890147430855736322396455256961908020639628324168576232619728144138850593189011186601377179448479400695204010228532368809898239160666976148615025017040384289131332907835256160746613285724491867314162189114509309673230402605392677600260977506077409856864439501<289> |