Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 138: | \[{17^{138}-1\over16}\] | 2 × 33 × 7 × 13 × 47 × 139 × 307 × 25225573 × 1191693343 × 9559382330644273<16> × 144905634142323992263<21> × 60844755602264877238459<23> × 26552618219228090162977481<26> × 1109309383381084655697725873<28> × 5385687325711213602812791946461<31> |