Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{28^{261}-1\over27}\] | 32 × 192 × 59 × 271 × 523 × 444979 × 77241733 × 5506203727<10> × 582595509837473004489665028935473297399<39> × 2490984281800796713523237526645659080993083834467855653648162831<64> × 2535290869358082011714948824933422309310312501980160134121921982677882232710716241284422811069424145529854793613348147494188504382292164316552198464301136093368454681279973815772627371444442329707916497107213130164046057883904546666364837987<241> |