Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 138: | \[{10^{138}-1\over9}\] | 3 × 7 × 11 × 13 × 37 × 47 × 139 × 277 × 2531 × 31051 × 143574021480139<15> × 203864078068831<15> × 549797184491917<15> × 11111111111111111111111<23> × 24649445347649059192745899<26> × 1595352086329224644348978893<28> |