EntityQ1321906· pop 12· linked from 220 articlesopen problemSign in to saveknown problem or question which is thought to have an objective and verifiable solution or explanation, but which has not yet been solvedConnectionsmathematicsEntityscienceEntityproteinEntitydigital object identifierEntityInternational Standard Serial NumberEntityNobel Prize in ChemistryEntityhistory of scienceEntityFermat's Last TheoremEntityQ180686EntitybibcodeEntityQ118398Entityfour color theoremEntityDemis HassabisEntityconjectureEntityDavid BakerEntityHilbert's problemsEntityPoincaré conjectureEntityMillennium ProblemsEntityQ22908627EntityMathematical ReviewsEntityCategoriesOpen problems