Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 481: | \[{5^{481}-1\over4}\] | 149 × 305175781 × 13971969971<11> × 8737481256739<13> × 117389621693362690004547547472535913720690996085923104650994393782052623922633171993037647725909926063227614475815369750667882293067699079<138> × 614472084244058567369033841444394374376600191226985044452628471219213589383093279036997545286198236283087988409174394530090256171413670747027960472923786097714891799<165> |