Calculate CRC-64/ECMA-182
Calculate CRC-64/ECMA-182 from text. The output is a 16-character hexadecimal checksum.
CRC-64 variants are wider than CRC-32, but the exact profile still matters. ECMA-182 uses polynomial 0x42F0E1EBA9EA3693 with no reflection and no final XOR.
Fixed-width output
The calculator pads CRC-64 values to 16 hexadecimal characters. Leading zeroes are part of the fixed-width representation.