1. Divide the number repeatedly by 2:
Keep track of each remainder.
We stop when we get a quotient that is equal to zero.
- division = quotient + remainder;
- 295 093 931 ÷ 2 = 147 546 965 + 1;
- 147 546 965 ÷ 2 = 73 773 482 + 1;
- 73 773 482 ÷ 2 = 36 886 741 + 0;
- 36 886 741 ÷ 2 = 18 443 370 + 1;
- 18 443 370 ÷ 2 = 9 221 685 + 0;
- 9 221 685 ÷ 2 = 4 610 842 + 1;
- 4 610 842 ÷ 2 = 2 305 421 + 0;
- 2 305 421 ÷ 2 = 1 152 710 + 1;
- 1 152 710 ÷ 2 = 576 355 + 0;
- 576 355 ÷ 2 = 288 177 + 1;
- 288 177 ÷ 2 = 144 088 + 1;
- 144 088 ÷ 2 = 72 044 + 0;
- 72 044 ÷ 2 = 36 022 + 0;
- 36 022 ÷ 2 = 18 011 + 0;
- 18 011 ÷ 2 = 9 005 + 1;
- 9 005 ÷ 2 = 4 502 + 1;
- 4 502 ÷ 2 = 2 251 + 0;
- 2 251 ÷ 2 = 1 125 + 1;
- 1 125 ÷ 2 = 562 + 1;
- 562 ÷ 2 = 281 + 0;
- 281 ÷ 2 = 140 + 1;
- 140 ÷ 2 = 70 + 0;
- 70 ÷ 2 = 35 + 0;
- 35 ÷ 2 = 17 + 1;
- 17 ÷ 2 = 8 + 1;
- 8 ÷ 2 = 4 + 0;
- 4 ÷ 2 = 2 + 0;
- 2 ÷ 2 = 1 + 0;
- 1 ÷ 2 = 0 + 1;
2. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
295 093 931(10) = 1 0001 1001 0110 1100 0110 1010 1011(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 29.
- A signed binary's bit length must be equal to a power of 2, as of:
- 21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
- The first bit (the leftmost) indicates the sign:
- 0 = positive integer number, 1 = negative integer number
The least number that is:
1) a power of 2
2) and is larger than the actual length, 29,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 32.
4. Get the positive binary computer representation on 32 bits (4 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 32.
Decimal Number 295 093 931(10) converted to signed binary in two's complement representation:
Spaces were used to group digits: for binary, by 4, for decimal, by 3.