python long integer division error. how do I fix this?

Question

This problem arose from my prime factorization function. When I try to divide a long integer with integer. It gives a value in scientific notation. And it is not exactly correct answer.

18291821821212182811 / 3 = 6.097273940404061e+18

here,

6.097273940404061e+18 is the same as this, 6097273940404061000

6097273940404061000 * 3 must be equal to 18291821821212182811

but there is 189 integer differences.

6097273940404061000 * 3 is 189 bigger than 18291821821212182811

6097273940404061000 * 3 - 18291821821212182811 = 189

So why does this not give exact number?? I am thinking that the python changes the form into scientific notation with floating point and that leads to arithmetic error. Is there any way around this ? Is there any way I can tell python not to change it into floating point during the calculation if that's the problem.

Answer 1

You have to use integer division //:

18291821821212182811 // 3 = 6097273940404060937