EntityQ1052622· pop 19· linked from 15 articlesBrocard's problemSign in to savethe Diophantine problem of finding an integer, whose factorial plus one is a perfect squareConnectionsmathematicsEntityInternational Standard Book NumberEntityintegerEntitySrinivasa RamanujanEntitydigital object identifierEntityfactorialEntityPaul ErdősEntityG.H. HardyEntityMathWorldEntityQ22908627Entitylist of unsolved problems in mathematicsEntityabc conjectureEntityEric W. WeissteinEntityMathematical ReviewsEntityHenri BrocardEntityRichard K. GuyEntityBrocard's conjectureEntityBrady HaranEntityClifford A. PickoverEntityCategoriesAbc conjectureDiophantine equationsFactorial and binomial topicsSrinivasa RamanujanUnsolved problems in number theory