Question 17940
gcf(5183,511)=
gcf(287,259)= 
and gcf(253,407)= 
i will show you one example....gcf(5183,511)=
  and you can do the rest on that basis
take bigger number .divide it with smaller number
.....511)5183(10
.........5110.take the remainder and use it to divide the previous smaller no.
-------------------
reminder...73)511(7
..............511..now there is no remainder.so we stop here.the answer is 73
-------------------
reminder.......0...hence gcf(5183,511)=73