▁address ▁in ▁computers ▁with ▁ 2 4 - bit ▁registers ▁or ▁data ▁bus es . ▁▁ 2 2 9 ▁= ▁ 5 3 6 , 8 7 0 , 9 1 2 ▁ ▁The ▁largest ▁power ▁of ▁two ▁with ▁distinct ▁digits ▁in ▁base ▁ten . ▁▁ 2 3 0 ▁= ▁ 1 , 0 7 3 , 7 4 1 , 8 2 4 ▁ ▁The ▁binary ▁approximation ▁of ▁the ▁g iga -, ▁or ▁ 1 , 0 0 0 , 0 0 0 , 0 0 0 ▁multip lier , ▁which ▁causes ▁a ▁change ▁of ▁prefix . ▁For ▁example , ▁ 1 , 0 7 3 , 7 4 1 , 8 2 4 ▁bytes ▁= ▁ 1   g ig aby te ▁( or ▁g ib ib y te ). ▁ ▁This ▁number ▁has ▁no ▁special ▁significance ▁to ▁computers , ▁but ▁is ▁important ▁to ▁humans ▁because ▁we ▁make ▁use ▁of ▁powers ▁of ▁ten . ▁▁ 2 3 1 ▁= ▁ 2 , 1 4 7 , 4 8 3 , 6 4 8 ▁ ▁The ▁number ▁of ▁non - negative ▁values ▁for ▁a ▁signed ▁ 3 2 - bit ▁integer . ▁Since ▁Unix ▁time ▁is ▁measured ▁in ▁seconds ▁since ▁January ▁ 1 , ▁ 1 9 7 0 , ▁it ▁will ▁run ▁out ▁at ▁ 2 , 1 4 7 , 4 8 3 , 6 4 7 ▁seconds ▁or ▁ 0 3 : 1 4 : 0 7 ▁UTC ▁on ▁T ues day , ▁ 1 9 ▁January ▁ 2