The improvement is 2⁸⁰ − 2⁶⁴ = 2⁶⁴(2¹⁶ − 1) = 18446744073709551616 × 65535 = <<18446744073709551616*65535=120892459414852865724713604639740173760>>120892459414852865724713604639740173760 - go-checkin.com