Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 257: | \[{10^{257}-1\over9}\] | 1017721 × 4271961427 × 668337078771358175173561511352921717498789809202021239<54> × 20681782035095012570348770193027967570464573338540010029348210640101028474215350858563<86> × 184891914325572583999103829191769397590949868815625664836282968378825198591804410927364026968229554369<102> |