1532 = 2*766 = 2*2*383 Since 383 is prime, no factorial before 383! contains it as a factor. But 383! contains 2 as a factor at least twice so the answer is 383! = 526171930465521393785596080975482340028727379802712622496500876 963285950823045759568621510826669217686959095980120129991997296 111678847138618689553743676623200608630139185868483749406451972 652797372080601186350469827662118721278054876618333025641989470 747253853843684403188032652737687978992980782382630667334670925 071634771933501959569717412491518202250599581857329817250305066 354126336873559016848571122757164611918020749186865176435755672 885471377690987038232530545883783261740691642714422780247302535 241869482325905128700979075906976819859564235316258788734986595 975023130500784811526393017472968767150759365718618086071635135 868396774834248250349890800070786168030132600866093831008299165 773242612121038057040894685301954314240000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000 000000 Edwin