Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 505: | \[{8^{505}-1\over7}\] | 31 × 151 × 607 × 1481671 × 3175441 × 4451071 × 7432339208719<13> × 341117531003194129<18> × 1906785849099933631<19> × 1512768222413735255864403005264105839324374778520631853993<58> × 3684715492976745864148701390932412346912774614623905417821212172740455201010475127849201<88> × 698963720154843264243253784220387078257259218502563908013880224534654264461065235983821688087336215521<102> × 146499194993760060191106297630230032363652651662620455817967474417402801410928837845181661179012566872661347094427394236531161816594271<135> |