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;
- 1 610 613 046 ÷ 2 = 805 306 523 + 0;
- 805 306 523 ÷ 2 = 402 653 261 + 1;
- 402 653 261 ÷ 2 = 201 326 630 + 1;
- 201 326 630 ÷ 2 = 100 663 315 + 0;
- 100 663 315 ÷ 2 = 50 331 657 + 1;
- 50 331 657 ÷ 2 = 25 165 828 + 1;
- 25 165 828 ÷ 2 = 12 582 914 + 0;
- 12 582 914 ÷ 2 = 6 291 457 + 0;
- 6 291 457 ÷ 2 = 3 145 728 + 1;
- 3 145 728 ÷ 2 = 1 572 864 + 0;
- 1 572 864 ÷ 2 = 786 432 + 0;
- 786 432 ÷ 2 = 393 216 + 0;
- 393 216 ÷ 2 = 196 608 + 0;
- 196 608 ÷ 2 = 98 304 + 0;
- 98 304 ÷ 2 = 49 152 + 0;
- 49 152 ÷ 2 = 24 576 + 0;
- 24 576 ÷ 2 = 12 288 + 0;
- 12 288 ÷ 2 = 6 144 + 0;
- 6 144 ÷ 2 = 3 072 + 0;
- 3 072 ÷ 2 = 1 536 + 0;
- 1 536 ÷ 2 = 768 + 0;
- 768 ÷ 2 = 384 + 0;
- 384 ÷ 2 = 192 + 0;
- 192 ÷ 2 = 96 + 0;
- 96 ÷ 2 = 48 + 0;
- 48 ÷ 2 = 24 + 0;
- 24 ÷ 2 = 12 + 0;
- 12 ÷ 2 = 6 + 0;
- 6 ÷ 2 = 3 + 0;
- 3 ÷ 2 = 1 + 1;
- 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.
1 610 613 046(10) = 110 0000 0000 0000 0000 0001 0011 0110(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 31.
- 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, 31,
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 1 610 613 046(10) converted to signed binary in two's complement representation:
Spaces were used to group digits: for binary, by 4, for decimal, by 3.