JavaScript is wrong converting big numbers from binary to hex

Asked Aug 28 '15 at 19:10

Active Aug 28 '15 at 19:25

Viewed 103 times

I'm using a simple technique to convert binary numbers to hexadecimal.

parseInt('1011110000',2).toString(16) == '2f0'
parseInt('111110011111101111100111011011001',2).toString(16) == '1F3F7CED9'

With larger binary numbers, I'm encountering a problem:

parseInt('11000011010011001100110011001100110011001100110011001100',2).toString(16);

Returns c34cccccccccd0 instead of correct value c34cccccccccc.

Minus four bits solve the problem:

parseInt('1100001101001100110011001100110011001100110011001100',2).toString(16);

Returns c34cccccccccc.

Why does this happen? How can I avoid this problem and convert large binary numbers into hexadecimal numbers?

edited Aug 28 '15 at 19:25

user229044

asked Aug 28 '15 at 19:10

Ilya Manyahin

The number's too big, JS can't handle it, sorry. – Aug 28 '15 at 19:15
http://stackoverflow.com/questions/307179/what-is-javascripts-highest-integer-value-that-a-number-can-go-to-without-losin – user229044 Aug 28 '15 at 19:17

0 Answers0