Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 302: | \[{20^{302}-1\over19}\] | 3 × 7 × 4229 × 637239329 × 5519525047<10> × 25423286839<11> × 134514539969<12> × 25876994961863<14> × 337949154488989<15> × 5847714892845957955723<22> × 309697263932086039828104882838712610494719<42> × 5232204626707648449380809177494756211834928582631809<52> × 25517193589776565228397705061409969056835464082241004608797977404080980589<74> × 18986132532274249641605173354560187896813745902116771000761036892776696824204314173806535800002450632831727963027588251212979243127<131> |