EntityQ5100807· pop 7· linked from 34 articlesChinese hypothesisSign in to savethe false conjecture that a positive integer 𝑛 is prime iff 𝑛 divides 2ⁿ−2ConnectionsFermat pseudoprimeEntityFirst Hardy–Littlewood conjectureEntityInternational Standard Book NumberEntityprime numberEntityQing dynastyEntityintegerEntitynumber theoryEntitydigital object identifierEntityPaul ErdősEntitycomposite numberEntitydivisorEntityJSTOROrganizationGoldbach's conjectureEntityJames Hopwood JeansEntityFermat's little theoremEntityif and only ifEntityconjectureEntitytwin primeEntityJoseph NeedhamEntitycounterexampleEntityCategoriesChinese mathematicsConjectures about prime numbersDisproved conjecturesMisconceptionsPseudoprimes