Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 423: | \[{15^{423}-1\over14}\] | 241 × 283 × 541 × 659 × 2351 × 6299 × 21061 × 183959 × 4713067 × 67446383023<11> × 206781401997549307<18> × 2656097495066872027407960633754824283<37> × 314237271383389423579059164944752760282278580559386914443551938269774331526251335083462921685359096483<102> × [286146646383868954161509726483733264912633067234980061228430506884179932850808041828310112133197477501211403392073557801898556874672100759282806563691923476373001596045950460328407354864523677450811807283061803035637606655655316698442003322594631434496492350372773989968131701322036589122017328541<297>] |