What are the required steps to convert base 10 integer
number 2 323 239 281 607 to signed binary code (in base 2)?
- A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.
1. Divide the number repeatedly by 2:
Keep track of each remainder.
Stop when you get a quotient that is equal to zero.
- division = quotient + remainder;
- 2 323 239 281 607 ÷ 2 = 1 161 619 640 803 + 1;
- 1 161 619 640 803 ÷ 2 = 580 809 820 401 + 1;
- 580 809 820 401 ÷ 2 = 290 404 910 200 + 1;
- 290 404 910 200 ÷ 2 = 145 202 455 100 + 0;
- 145 202 455 100 ÷ 2 = 72 601 227 550 + 0;
- 72 601 227 550 ÷ 2 = 36 300 613 775 + 0;
- 36 300 613 775 ÷ 2 = 18 150 306 887 + 1;
- 18 150 306 887 ÷ 2 = 9 075 153 443 + 1;
- 9 075 153 443 ÷ 2 = 4 537 576 721 + 1;
- 4 537 576 721 ÷ 2 = 2 268 788 360 + 1;
- 2 268 788 360 ÷ 2 = 1 134 394 180 + 0;
- 1 134 394 180 ÷ 2 = 567 197 090 + 0;
- 567 197 090 ÷ 2 = 283 598 545 + 0;
- 283 598 545 ÷ 2 = 141 799 272 + 1;
- 141 799 272 ÷ 2 = 70 899 636 + 0;
- 70 899 636 ÷ 2 = 35 449 818 + 0;
- 35 449 818 ÷ 2 = 17 724 909 + 0;
- 17 724 909 ÷ 2 = 8 862 454 + 1;
- 8 862 454 ÷ 2 = 4 431 227 + 0;
- 4 431 227 ÷ 2 = 2 215 613 + 1;
- 2 215 613 ÷ 2 = 1 107 806 + 1;
- 1 107 806 ÷ 2 = 553 903 + 0;
- 553 903 ÷ 2 = 276 951 + 1;
- 276 951 ÷ 2 = 138 475 + 1;
- 138 475 ÷ 2 = 69 237 + 1;
- 69 237 ÷ 2 = 34 618 + 1;
- 34 618 ÷ 2 = 17 309 + 0;
- 17 309 ÷ 2 = 8 654 + 1;
- 8 654 ÷ 2 = 4 327 + 0;
- 4 327 ÷ 2 = 2 163 + 1;
- 2 163 ÷ 2 = 1 081 + 1;
- 1 081 ÷ 2 = 540 + 1;
- 540 ÷ 2 = 270 + 0;
- 270 ÷ 2 = 135 + 0;
- 135 ÷ 2 = 67 + 1;
- 67 ÷ 2 = 33 + 1;
- 33 ÷ 2 = 16 + 1;
- 16 ÷ 2 = 8 + 0;
- 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.
2 323 239 281 607(10) = 10 0001 1100 1110 1011 1101 1010 0010 0011 1100 0111(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 42.
- 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, 42,
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:
2 323 239 281 607(10) Base 10 integer number converted and written as a signed binary code (in base 2):
2 323 239 281 607(10) = 0000 0000 0000 0000 0000 0010 0001 1100 1110 1011 1101 1010 0010 0011 1100 0111
Spaces were used to group digits: for binary, by 4, for decimal, by 3.