2の冪
2 2 9 = 2 512 {\displaystyle 2^{2^{9}}=2^{512}} = 13,407,807,929,942,597,099,574,024,998,205,846, 127,479,365,820,592,393,377,723,561,443,721,764,030,073,546,976,801,874,298,166, 903,427,690,031,858,186,486,050,853,753,882,811,946,569,946,433,649,006,084,096 (155桁)
2 2 10 = 2 1 , 024 {\displaystyle 2^{2^{10}}=2^{1,024}} = 179,769,313, 486,231,590,772,930,519,078,902,473,361,797,697,894,230,657,273,430,081,157,732, 675,805,500,963,132,708,477,322,407,536,021,120,113,879,871,393,357,658,789,768, 814,416,622,492,847,430,639,474,124,377,767,893,424,865,485,276,302,219,601,246, 094,119,453,082,952,085,005,768,838,150,682,342,462,881,473,913,110,540,827,237, 163,350,510,684,586,298,239,947,245,938,479,716,304,835,356,329,624,224,137,216 (309桁)
256ビットのAESの鍵空間の総数である。
2 2 2 1 = 2 4 = {\displaystyle 2^{2^{2^{1}}}=2^{4}=} 上記参照
2 2 2 2 = 2 16 = {\displaystyle 2^{2^{2^{2}}}=2^{16}=} 上記参照
2 2 2 3 = 2 256 = {\displaystyle 2^{2^{2^{3}}}=2^{256}=} 上記参照
2 2 2 4 = 2 2 16 = 2 65 , 536 = {\displaystyle 2^{2^{2^{4}}}=2^{2^{16}}=2^{65,536}=} 上記参照
2 2 2 5 = 2 2 32 = 2 4 , 294 , 967 , 296 = {\displaystyle 2^{2^{2^{5}}}=2^{2^{32}}=2^{4,294,967,296}=} 310,328,054,386,328,614,029,989,...,691,982,336 or exp 10 2  ( 9.
1万以上の最小の2の累乗数である。漢字圏の命数法では40の倍数と40n+14、27で接頭辞(万→億→兆)があがる。
符号付き16ビットで表せる非負整数の数である。