▁ ▁W . ▁Paul ▁Cook ▁( 1 8 8 0 – 1 9 4 8 ), ▁writer , ▁printer ▁and ▁publish er ▁ ▁See ▁also ▁ ▁Paul ▁Co oke ▁( born ▁ 1 9 6 1 ), ▁drum mer ▁for ▁S ade <0x0A> </s> ▁R ies el ▁S ieve ▁is ▁a ▁distributed ▁computing ▁project , ▁running ▁in ▁part ▁on ▁the ▁B OIN C ▁platform . ▁Its ▁aim ▁is ▁to ▁prove ▁that ▁ 5 0 9 , 2 0 3 ▁is ▁the ▁smallest ▁R ies el ▁number , ▁by ▁finding ▁a ▁prime ▁of ▁the ▁form ▁ ▁for ▁all ▁odd ▁ ▁smaller ▁than ▁ 5 0 9 , 2 0 3 . ▁ ▁Progress ▁of ▁the ▁project ▁At ▁the ▁start ▁of ▁the ▁project ▁in ▁August ▁ 2 0 0 3 , ▁there ▁were ▁ ▁less ▁than ▁ 5 0 9 , 2 0 3 ▁for ▁which ▁no ▁prime ▁ ▁was ▁known . ▁, ▁ 5 2 ▁of ▁these ▁ ▁had ▁been ▁elimin ated ▁by ▁R ies el ▁S ieve ▁or ▁outside ▁persons ; ▁the ▁largest ▁prime ▁found ▁by ▁this ▁project ▁is ▁ 5 0 2 , 5 7 3 ▁× ▁ 2 7 , 1 8 1 , 9 8 7 ▁− ▁ 1 ▁of ▁ 2 , 1 6 2 , 0 0 0 ▁digits , ▁and ▁it ▁is ▁known ▁that ▁for ▁none ▁of ▁the ▁remaining ▁ ▁there ▁is ▁a ▁prime ▁with ▁n ▁<= ▁ 1 0 , 0 0 0 , 0 0 0 ▁( As ▁of ▁February ▁ 2 0 2 0