Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 278: | \[{10^{278}-1\over9}\] | 11 × 557 × 2503 × 119124859925363<15> × 9327281575040435942820030416618073853906181206383845973140973454310325710523151012873614569275960380714495413018734336834397<124> × 652065570931334169846518762110895357104035953330623783530923329412897765703841859492780362601926814638167836591846272150911969126521<132> |