2的幂
维基百科，自由的百科全书
目录 |
表示方法 [编辑]
- 2n
- 2的n次幂
- 2的n次方
- power(2, n)
- 2 ^ n
- 2 ** n
与2的幂有关的数字 [编辑]
- 比某一个2的幂小1的素数在数学上被称为梅森素数；例如数字3是最小的梅森素数（3 = 4 - 1 = 22 - 1）。
- 比某一个2的幂大1的素数在数学上被称为费马素数；如数字3也是最小的费马素数（3 = 2 + 1 = 21 + 1）。
- 一个以2为分母的分数被称为二进有理数（dyadic rational）。
- 可以表示为连续正整数的和的数被称为礼貌数（polite number），这些数则是完全不含2的幂的数。
其他相关 [编辑]
2的幂的列表（部分） [编辑]
2n,n∈[0,70], n∈Z
| 20 | = | 1 | 212 | = | 4,096 | ||
| 21 | = | 2 | 213 | = | 8,192 | ||
| 22 | = | 4 | 214 | = | 16,384 | ||
| 23 | = | 8 | 215 | = | 32,768 | ||
| 24 | = | 16 | 216 | = | 65,536 | ||
| 25 | = | 32 | 217 | = | 131,072 | ||
| 26 | = | 64 | 218 | = | 262,144 | ||
| 27 | = | 128 | 219 | = | 524,288 | ||
| 28 | = | 256 | 220 | = | 1,048,576 | ||
| 29 | = | 512 | 221 | = | 2,097,152 | ||
| 210 | = | 1024 | 222 | = | 4,194,304 | ||
| 211 | = | 2,048 | 223 | = | 8,388,608 |
- 21 = 2
- 22 = 4
- 24 = 16
- 28 = 256
- 216 = 65,536
- 232 = 4,294,967,296
- 264 = 18,446,744,073,709,551,616
- 2128 = 340,282,366,920,938,463,463,374,607,431,768,211,456
- 2256 = 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936.
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