Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 445: | \[{8^{445}-1\over7}\] | 31 × 151 × 2671 × 78903841 × 486967951 × 1358103969241<13> × 28753302853087<14> × 68592177919591<14> × 119850770411474610841<21> × 618970019642690137449562111<27> × 3192423430636078166119279321<28> × 24124332437713924084267316537353<32> × 1460384540571001412284141831845453026637206635511<49> × 1213879697009617667840625625239307278583085260903037111<55> × 7281043041842781395260853247903560898126191181044290101875066161<64> × 1129060090498776695695894510527796547467241310969660978587998765351<67> |