Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 260: | \[{19^{260}-1\over18}\] | 23 × 52 × 11 × 53 × 131 × 151 × 181 × 313 × 599 × 911 × 2251 × 5981 × 29251 × 96851 × 176021 × 291331 × 38324521 × 52356721 × 133338869 × 153079681 × 16936647121<11> × 77685006382386461342123321<26> × 92174159182574048847888178637<29> × 764224739004587705859669872633651<33> × 325171039458979361506040909686733801<36> × 29742009376601733041746528172368311797231415121778161<53> × 3246406890499709418302441719934790054581965549380209299454146173701<67> |