Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 580: | \[{28^{580}-1\over27}\] | 52 × 11 × 292 × 59 × 61 × 157 × 233 × 349 × 1451 × 14561 × 40427 × 53951 × 84961 × 537661 × 637421 × 1074509 × 708359326721<12> × 148183507940521<15> × 245681335071811<15> × 8177803045607381<16> × 15490614825662562881<20> × 913498419901651568321<21> × [182041296600131387770433228802199549077352851732311894654399443608653139868069533666922417862472254072960075316646288280153215164645166571728553892205340155638876070807660242932510082253667561119629545501803206077295633220678002384373346160273948477416461238553446091406578376418755003417024146643736408616744857073068063454288410098890662517605540850607569552824407657951085124667476214210577702358341867513890195608445070498312310563683679442599121806008539668680283998044615730045878482745686060823782038842519185839687178889335095978171700164696063928417495561257272157252061032733019944350385738303230969195017237873599963157976615489164424982379422624691145008397760227083134915909<687>] |