BRENTFACTORS[4021]:=[ ,,,,,,,,,, [ 284734093711 ],, 
  [ 1503797387, 62684014568137 ],,,, 
  [ 6471071353, 20861946271, 111257149410638820670266169951 ],,,,,,,,,,,,,,,,,
  ,,,,,,, [ 350916805167119827747 ],, 
  [ 38016192483560069, 451752561137696340377951 ],,,,,,,,,, 
  [ 717718046736589237 ],,,,,,,, [ 3935317279, 10181115275711 ],,,,,, 
  [ 6909277446504718375825699, 84550141925347843308790580467 ],,,, 
  [ 95991855587137, 1059707636006119, 432622674153579136655835581 ],, 
  [ 2890379007193583063049691 ],,,,,,,,,, [ 40815823045907648621473 ],,,,,,,,,
  ,,,,, [ 885712463441503759 ],,,,,,,,,,,, [ 272337383173263437 ],,,,,,,,,,,,,
  ,,,,,,,,, [ 1347998641370723 ],,,,,,,,,,,,,,,,,, [ 5940172630581017 ],,,,,,,
  ,,,,,,, [ 95977492345489687 ] ];
