suma S = 1 + 2 + 2² + 2³ + .. + 2⁶³ = ( 2 -1) ·( 1 +2 +2² +2³ + ... + 2⁶³ ) =
= 2·1 + 2·2 + 2·2² + 2·2³ + ... + 2·2⁶³ - 1·1 - 1·2 - 1·2² -1·2³ - .... - 1 ·2⁶³ =
= 2 + 2² +2³ + 2⁴ + .... + 2⁶³ - 1 - 2 - 2² - 2³ - .... - 2⁶³ =
= 2⁶⁴ - 1
2⁶⁴ = ( 2¹⁰)⁶ ·2⁴ = 1024⁶· 16 = (1024³ )² · 16 = ( 1024 ·1024·1024 )²·16 =
= ( 1048576· 1024)²· 16 = 1048576²· 1024² · 16=
= 18.446.744.073.709.551.615 boabe ............ 1 gram / bob
⇒ 18.446.744.073.709.551.615 grame