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;
- 4 288 675 909 ÷ 2 = 2 144 337 954 + 1;
- 2 144 337 954 ÷ 2 = 1 072 168 977 + 0;
- 1 072 168 977 ÷ 2 = 536 084 488 + 1;
- 536 084 488 ÷ 2 = 268 042 244 + 0;
- 268 042 244 ÷ 2 = 134 021 122 + 0;
- 134 021 122 ÷ 2 = 67 010 561 + 0;
- 67 010 561 ÷ 2 = 33 505 280 + 1;
- 33 505 280 ÷ 2 = 16 752 640 + 0;
- 16 752 640 ÷ 2 = 8 376 320 + 0;
- 8 376 320 ÷ 2 = 4 188 160 + 0;
- 4 188 160 ÷ 2 = 2 094 080 + 0;
- 2 094 080 ÷ 2 = 1 047 040 + 0;
- 1 047 040 ÷ 2 = 523 520 + 0;
- 523 520 ÷ 2 = 261 760 + 0;
- 261 760 ÷ 2 = 130 880 + 0;
- 130 880 ÷ 2 = 65 440 + 0;
- 65 440 ÷ 2 = 32 720 + 0;
- 32 720 ÷ 2 = 16 360 + 0;
- 16 360 ÷ 2 = 8 180 + 0;
- 8 180 ÷ 2 = 4 090 + 0;
- 4 090 ÷ 2 = 2 045 + 0;
- 2 045 ÷ 2 = 1 022 + 1;
- 1 022 ÷ 2 = 511 + 0;
- 511 ÷ 2 = 255 + 1;
- 255 ÷ 2 = 127 + 1;
- 127 ÷ 2 = 63 + 1;
- 63 ÷ 2 = 31 + 1;
- 31 ÷ 2 = 15 + 1;
- 15 ÷ 2 = 7 + 1;
- 7 ÷ 2 = 3 + 1;
- 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.
4 288 675 909(10) = 1111 1111 1010 0000 0000 0000 0100 0101(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 32.
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) is reserved for 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, 32,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 64.
4. Get the positive binary computer representation on 64 bits (8 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64:
Number 4 288 675 909(10), a signed integer number (with sign),
converted from decimal system (from base 10)
and written as a signed binary (in base 2):
4 288 675 909(10) = 0000 0000 0000 0000 0000 0000 0000 0000 1111 1111 1010 0000 0000 0000 0100 0101
Spaces were used to group digits: for binary, by 4, for decimal, by 3.