Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 488: | \[{7^{488}-1\over6}\] | 25 × 52 × 367 × 977 × 1201 × 2441 × 4759 × 4497653 × 133440673 × 177237331 × 1424727548622109609<19> × 1914662449813727660680530326064591907<37> × 369232401898464835382701047039367301441<39> × 1141344899459682026753500636360162456697950330909<49> × 444519128147170444656914672945689439050880209231501<51> × 19595420854935607497383076422712699629876823600725935653362105805816322765995533255363304328427938566799023177010463007436175220368124517985238759400514200983203923602483453950977<179> |