Skip to main content
CRC Calc

CRC-64 / REDIS

Width64-bitRefInYesRefOutYes

Need custom parameters? Open in full calculator

Standard test string

Result

0xE9C6D914C4B8D9CA

Similar CRC Algorithms

Browse all algorithms

Result is calculated from the current input. Check is the published verification value for the standard input 123456789. Click another algorithm to view its detail page.

CRC-64 / GO-ISO
64-bitPoly 0x000000000000001BIn Yes Out Yes

Result

0xB90956C775A41001

Check

0xB90956C775A41001

CRC-64 / MS
64-bitPoly 0x259C84CBA6426349In Yes Out Yes

Result

0x75D4B74F024ECEEA

Check

0x75D4B74F024ECEEA

CRC-64 / NVME
64-bitPoly 0xAD93D23594C93659In Yes Out Yes

Result

0xAE8B14860A799888

Check

0xAE8B14860A799888

CRC-64 / REDIS Current
64-bitPoly 0xAD93D23594C935A9In Yes Out Yes

Result

0xE9C6D914C4B8D9CA

Check

0xE9C6D914C4B8D9CA

CRC-64 / XZ
64-bitPoly 0x42F0E1EBA9EA3693In Yes Out Yes

Result

0x995DC9BBDF1939FA

Check

0x995DC9BBDF1939FA

CRC Lookup Table

0x00000000000000000x7AD870C8303589790xF5B0E190606B12F20x8F689158505E9B8B0xC038E5739841B68F0xBAE095BBA8743FF60x358804E3F82AA47D0x4F50742BC81F2D040xAB28ECB46814FE750xD1F09C7C5821770C0x5E980D24087FEC870x24407DEC384A65FE0x6B1009C7F05548FA0x11C8790FC060C1830x9EA0E857903E5A080xE478989FA00BD371
0x7D08FF3B88BE6F810x07D08FF3B88BE6F80x88B81EABE8D57D730xF2606E63D8E0F40A0xBD301A4810FFD90E0xC7E86A8020CA50770x4880FBD87094CBFC0x32588B1040A142850xD620138FE0AA91F40xACF86347D09F188D0x2390F21F80C183060x594882D7B0F40A7F0x1618F6FC78EB277B0x6CC0863448DEAE020xE3A8176C188035890x997067A428B5BCF0
0xFA11FE77117CDF020x80C98EBF2149567B0x0FA11FE77117CDF00x75796F2F412244890x3A291B04893D698D0x40F16BCCB908E0F40xCF99FA94E9567B7F0xB5418A5CD963F2060x513912C3796821770x2BE1620B495DA80E0xA489F353190333850xDE51839B2936BAFC0x9101F7B0E12997F80xEBD98778D11C1E810x64B116208142850A0x1E6966E8B1770C73
0x8719014C99C2B0830xFDC17184A9F739FA0x72A9E0DCF9A9A2710x08719014C99C2B080x4721E43F0183060C0x3DF994F731B68F750xB29105AF61E814FE0xC849756751DD9D870x2C31EDF8F1D64EF60x56E99D30C1E3C78F0xD9810C6891BD5C040xA3597CA0A188D57D0xEC09088B6997F8790x96D1784359A271000x19B9E91B09FCEA8B0x636199D339C963F2
0xDF7ADABD7A6E2D6F0xA5A2AA754A5BA4160x2ACA3B2D1A053F9D0x50124BE52A30B6E40x1F423FCEE22F9BE00x659A4F06D21A12990xEAF2DE5E824489120x902AAE96B271006B0x74523609127AD31A0x0E8A46C1224F5A630x81E2D7997211C1E80xFB3AA751422448910xB46AD37A8A3B65950xCEB2A3B2BA0EECEC0x41DA32EAEA5077670x3B024222DA65FE1E
0xA2722586F2D042EE0xD8AA554EC2E5CB970x57C2C41692BB501C0x2D1AB4DEA28ED9650x624AC0F56A91F4610x1892B03D5AA47D180x97FA21650AFAE6930xED2251AD3ACF6FEA0x095AC9329AC4BC9B0x7382B9FAAAF135E20xFCEA28A2FAAFAE690x8632586ACA9A27100xC9622C4102850A140xB3BA5C8932B0836D0x3CD2CDD162EE18E60x460ABD1952DB919F
0x256B24CA6B12F26D0x5FB354025B277B140xD0DBC55A0B79E09F0xAA03B5923B4C69E60xE553C1B9F35344E20x9F8BB171C366CD9B0x10E32029933856100x6A3B50E1A30DDF690x8E43C87E03060C180xF49BB8B6333385610x7BF329EE636D1EEA0x012B5926535897930x4E7B2D0D9B47BA970x34A35DC5AB7233EE0xBBCBCC9DFB2CA8650xC113BC55CB19211C
0x5863DBF1E3AC9DEC0x22BBAB39D39914950xADD33A6183C78F1E0xD70B4AA9B3F206670x985B3E827BED2B630xE2834E4A4BD8A21A0x6DEBDF121B8639910x1733AFDA2BB3B0E80xF34B37458BB863990x8993478DBB8DEAE00x06FBD6D5EBD3716B0x7C23A61DDBE6F8120x3373D23613F9D5160x49ABA2FE23CC5C6F0xC6C333A67392C7E40xBC1B436E43A74E9D
0x95AC9329AC4BC9B50xEF74E3E19C7E40CC0x601C72B9CC20DB470x1AC40271FC15523E0x5594765A340A7F3A0x2F4C0692043FF6430xA02497CA54616DC80xDAFCE7026454E4B10x3E847F9DC45F37C00x445C0F55F46ABEB90xCB349E0DA43425320xB1ECEEC59401AC4B0xFEBC9AEE5C1E814F0x8464EA266C2B08360x0B0C7B7E3C7593BD0x71D40BB60C401AC4
0xE8A46C1224F5A6340x927C1CDA14C02F4D0x1D148D82449EB4C60x67CCFD4A74AB3DBF0x289C8961BCB410BB0x5244F9A98C8199C20xDD2C68F1DCDF02490xA7F41839ECEA8B300x438C80A64CE158410x3954F06E7CD4D1380xB63C61362C8A4AB30xCCE411FE1CBFC3CA0x83B465D5D4A0EECE0xF96C151DE49567B70x76048445B4CBFC3C0x0CDCF48D84FE7545
0x6FBD6D5EBD3716B70x15651D968D029FCE0x9A0D8CCEDD5C04450xE0D5FC06ED698D3C0xAF85882D2576A0380xD55DF8E5154329410x5A3569BD451DB2CA0x20ED197575283BB30xC49581EAD523E8C20xBE4DF122E51661BB0x3125607AB548FA300x4BFD10B2857D73490x04AD64994D625E4D0x7E7514517D57D7340xF11D85092D094CBF0x8BC5F5C11D3CC5C6
0x12B59265358979360x686DE2AD05BCF04F0xE70573F555E26BC40x9DDD033D65D7E2BD0xD28D7716ADC8CFB90xA85507DE9DFD46C00x273D9686CDA3DD4B0x5DE5E64EFD9654320xB99D7ED15D9D87430xC3450E196DA80E3A0x4C2D9F413DF695B10x36F5EF890DC31CC80x79A59BA2C5DC31CC0x037DEB6AF5E9B8B50x8C157A32A5B7233E0xF6CD0AFA9582AA47
0x4AD64994D625E4DA0x300E395CE6106DA30xBF66A804B64EF6280xC5BED8CC867B7F510x8AEEACE74E6452550xF036DC2F7E51DB2C0x7F5E4D772E0F40A70x05863DBF1E3AC9DE0xE1FEA520BE311AAF0x9B26D5E88E0493D60x144E44B0DE5A085D0x6E963478EE6F81240x21C640532670AC200x5B1E309B164525590xD476A1C3461BBED20xAEAED10B762E37AB
0x37DEB6AF5E9B8B5B0x4D06C6676EAE02220xC26E573F3EF099A90xB8B627F70EC510D00xF7E653DCC6DA3DD40x8D3E2314F6EFB4AD0x0256B24CA6B12F260x788EC2849684A65F0x9CF65A1B368F752E0xE62E2AD306BAFC570x6946BB8B56E467DC0x139ECB4366D1EEA50x5CCEBF68AECEC3A10x2616CFA09EFB4AD80xA97E5EF8CEA5D1530xD3A62E30FE90582A
0xB0C7B7E3C7593BD80xCA1FC72BF76CB2A10x45775673A732292A0x3FAF26BB9707A0530x70FF52905F188D570x0A2722586F2D042E0x854FB3003F739FA50xFF97C3C80F4616DC0x1BEF5B57AF4DC5AD0x61372B9F9F784CD40xEE5FBAC7CF26D75F0x9487CA0FFF135E260xDBD7BE24370C73220xA10FCEEC0739FA5B0x2E675FB4576761D00x54BF2F7C6752E8A9
0xCDCF48D84FE754590xB71738107FD2DD200x387FA9482F8C46AB0x42A7D9801FB9CFD20x0DF7ADABD7A6E2D60x772FDD63E7936BAF0xF8474C3BB7CDF0240x829F3CF387F8795D0x66E7A46C27F3AA2C0x1C3FD4A417C623550x935745FC4798B8DE0xE98F353477AD31A70xA6DF411FBFB21CA30xDC0731D78F8795DA0x536FA08FDFD90E510x29B7D047EFEC8728

CRC Source Code

/* 
 * Model: CRC-64 / REDIS (64-bit)
 * Poly: 0xAD93D23594C935A9, Init: 0x0000000000000000, XorOut: 0x0000000000000000
 * CRC Table C Source Code & Lookup Table Generator
 */
#include <stdint.h>
#include <stddef.h>

const uint64_t crc_table[256] = {
  0x0000000000000000, 0x7AD870C830358979, 0xF5B0E190606B12F2, 0x8F689158505E9B8B, 0xC038E5739841B68F, 0xBAE095BBA8743FF6, 0x358804E3F82AA47D, 0x4F50742BC81F2D04, 
  0xAB28ECB46814FE75, 0xD1F09C7C5821770C, 0x5E980D24087FEC87, 0x24407DEC384A65FE, 0x6B1009C7F05548FA, 0x11C8790FC060C183, 0x9EA0E857903E5A08, 0xE478989FA00BD371, 
  0x7D08FF3B88BE6F81, 0x07D08FF3B88BE6F8, 0x88B81EABE8D57D73, 0xF2606E63D8E0F40A, 0xBD301A4810FFD90E, 0xC7E86A8020CA5077, 0x4880FBD87094CBFC, 0x32588B1040A14285, 
  0xD620138FE0AA91F4, 0xACF86347D09F188D, 0x2390F21F80C18306, 0x594882D7B0F40A7F, 0x1618F6FC78EB277B, 0x6CC0863448DEAE02, 0xE3A8176C18803589, 0x997067A428B5BCF0, 
  0xFA11FE77117CDF02, 0x80C98EBF2149567B, 0x0FA11FE77117CDF0, 0x75796F2F41224489, 0x3A291B04893D698D, 0x40F16BCCB908E0F4, 0xCF99FA94E9567B7F, 0xB5418A5CD963F206, 
  0x513912C379682177, 0x2BE1620B495DA80E, 0xA489F35319033385, 0xDE51839B2936BAFC, 0x9101F7B0E12997F8, 0xEBD98778D11C1E81, 0x64B116208142850A, 0x1E6966E8B1770C73, 
  0x8719014C99C2B083, 0xFDC17184A9F739FA, 0x72A9E0DCF9A9A271, 0x08719014C99C2B08, 0x4721E43F0183060C, 0x3DF994F731B68F75, 0xB29105AF61E814FE, 0xC849756751DD9D87, 
  0x2C31EDF8F1D64EF6, 0x56E99D30C1E3C78F, 0xD9810C6891BD5C04, 0xA3597CA0A188D57D, 0xEC09088B6997F879, 0x96D1784359A27100, 0x19B9E91B09FCEA8B, 0x636199D339C963F2, 
  0xDF7ADABD7A6E2D6F, 0xA5A2AA754A5BA416, 0x2ACA3B2D1A053F9D, 0x50124BE52A30B6E4, 0x1F423FCEE22F9BE0, 0x659A4F06D21A1299, 0xEAF2DE5E82448912, 0x902AAE96B271006B, 
  0x74523609127AD31A, 0x0E8A46C1224F5A63, 0x81E2D7997211C1E8, 0xFB3AA75142244891, 0xB46AD37A8A3B6595, 0xCEB2A3B2BA0EECEC, 0x41DA32EAEA507767, 0x3B024222DA65FE1E, 
  0xA2722586F2D042EE, 0xD8AA554EC2E5CB97, 0x57C2C41692BB501C, 0x2D1AB4DEA28ED965, 0x624AC0F56A91F461, 0x1892B03D5AA47D18, 0x97FA21650AFAE693, 0xED2251AD3ACF6FEA, 
  0x095AC9329AC4BC9B, 0x7382B9FAAAF135E2, 0xFCEA28A2FAAFAE69, 0x8632586ACA9A2710, 0xC9622C4102850A14, 0xB3BA5C8932B0836D, 0x3CD2CDD162EE18E6, 0x460ABD1952DB919F, 
  0x256B24CA6B12F26D, 0x5FB354025B277B14, 0xD0DBC55A0B79E09F, 0xAA03B5923B4C69E6, 0xE553C1B9F35344E2, 0x9F8BB171C366CD9B, 0x10E3202993385610, 0x6A3B50E1A30DDF69, 
  0x8E43C87E03060C18, 0xF49BB8B633338561, 0x7BF329EE636D1EEA, 0x012B592653589793, 0x4E7B2D0D9B47BA97, 0x34A35DC5AB7233EE, 0xBBCBCC9DFB2CA865, 0xC113BC55CB19211C, 
  0x5863DBF1E3AC9DEC, 0x22BBAB39D3991495, 0xADD33A6183C78F1E, 0xD70B4AA9B3F20667, 0x985B3E827BED2B63, 0xE2834E4A4BD8A21A, 0x6DEBDF121B863991, 0x1733AFDA2BB3B0E8, 
  0xF34B37458BB86399, 0x8993478DBB8DEAE0, 0x06FBD6D5EBD3716B, 0x7C23A61DDBE6F812, 0x3373D23613F9D516, 0x49ABA2FE23CC5C6F, 0xC6C333A67392C7E4, 0xBC1B436E43A74E9D, 
  0x95AC9329AC4BC9B5, 0xEF74E3E19C7E40CC, 0x601C72B9CC20DB47, 0x1AC40271FC15523E, 0x5594765A340A7F3A, 0x2F4C0692043FF643, 0xA02497CA54616DC8, 0xDAFCE7026454E4B1, 
  0x3E847F9DC45F37C0, 0x445C0F55F46ABEB9, 0xCB349E0DA4342532, 0xB1ECEEC59401AC4B, 0xFEBC9AEE5C1E814F, 0x8464EA266C2B0836, 0x0B0C7B7E3C7593BD, 0x71D40BB60C401AC4, 
  0xE8A46C1224F5A634, 0x927C1CDA14C02F4D, 0x1D148D82449EB4C6, 0x67CCFD4A74AB3DBF, 0x289C8961BCB410BB, 0x5244F9A98C8199C2, 0xDD2C68F1DCDF0249, 0xA7F41839ECEA8B30, 
  0x438C80A64CE15841, 0x3954F06E7CD4D138, 0xB63C61362C8A4AB3, 0xCCE411FE1CBFC3CA, 0x83B465D5D4A0EECE, 0xF96C151DE49567B7, 0x76048445B4CBFC3C, 0x0CDCF48D84FE7545, 
  0x6FBD6D5EBD3716B7, 0x15651D968D029FCE, 0x9A0D8CCEDD5C0445, 0xE0D5FC06ED698D3C, 0xAF85882D2576A038, 0xD55DF8E515432941, 0x5A3569BD451DB2CA, 0x20ED197575283BB3, 
  0xC49581EAD523E8C2, 0xBE4DF122E51661BB, 0x3125607AB548FA30, 0x4BFD10B2857D7349, 0x04AD64994D625E4D, 0x7E7514517D57D734, 0xF11D85092D094CBF, 0x8BC5F5C11D3CC5C6, 
  0x12B5926535897936, 0x686DE2AD05BCF04F, 0xE70573F555E26BC4, 0x9DDD033D65D7E2BD, 0xD28D7716ADC8CFB9, 0xA85507DE9DFD46C0, 0x273D9686CDA3DD4B, 0x5DE5E64EFD965432, 
  0xB99D7ED15D9D8743, 0xC3450E196DA80E3A, 0x4C2D9F413DF695B1, 0x36F5EF890DC31CC8, 0x79A59BA2C5DC31CC, 0x037DEB6AF5E9B8B5, 0x8C157A32A5B7233E, 0xF6CD0AFA9582AA47, 
  0x4AD64994D625E4DA, 0x300E395CE6106DA3, 0xBF66A804B64EF628, 0xC5BED8CC867B7F51, 0x8AEEACE74E645255, 0xF036DC2F7E51DB2C, 0x7F5E4D772E0F40A7, 0x05863DBF1E3AC9DE, 
  0xE1FEA520BE311AAF, 0x9B26D5E88E0493D6, 0x144E44B0DE5A085D, 0x6E963478EE6F8124, 0x21C640532670AC20, 0x5B1E309B16452559, 0xD476A1C3461BBED2, 0xAEAED10B762E37AB, 
  0x37DEB6AF5E9B8B5B, 0x4D06C6676EAE0222, 0xC26E573F3EF099A9, 0xB8B627F70EC510D0, 0xF7E653DCC6DA3DD4, 0x8D3E2314F6EFB4AD, 0x0256B24CA6B12F26, 0x788EC2849684A65F, 
  0x9CF65A1B368F752E, 0xE62E2AD306BAFC57, 0x6946BB8B56E467DC, 0x139ECB4366D1EEA5, 0x5CCEBF68AECEC3A1, 0x2616CFA09EFB4AD8, 0xA97E5EF8CEA5D153, 0xD3A62E30FE90582A, 
  0xB0C7B7E3C7593BD8, 0xCA1FC72BF76CB2A1, 0x45775673A732292A, 0x3FAF26BB9707A053, 0x70FF52905F188D57, 0x0A2722586F2D042E, 0x854FB3003F739FA5, 0xFF97C3C80F4616DC, 
  0x1BEF5B57AF4DC5AD, 0x61372B9F9F784CD4, 0xEE5FBAC7CF26D75F, 0x9487CA0FFF135E26, 0xDBD7BE24370C7322, 0xA10FCEEC0739FA5B, 0x2E675FB4576761D0, 0x54BF2F7C6752E8A9, 
  0xCDCF48D84FE75459, 0xB71738107FD2DD20, 0x387FA9482F8C46AB, 0x42A7D9801FB9CFD2, 0x0DF7ADABD7A6E2D6, 0x772FDD63E7936BAF, 0xF8474C3BB7CDF024, 0x829F3CF387F8795D, 
  0x66E7A46C27F3AA2C, 0x1C3FD4A417C62355, 0x935745FC4798B8DE, 0xE98F353477AD31A7, 0xA6DF411FBFB21CA3, 0xDC0731D78F8795DA, 0x536FA08FDFD90E51, 0x29B7D047EFEC8728
};

uint64_t calculate_crc(const uint8_t *data, size_t length) {
    uint64_t crc = 0x0000000000000000;
    for (size_t i = 0; i < length; i++) {
        #if 1
        uint8_t idx = (uint8_t)(crc ^ data[i]);
        crc = (crc >> 8) ^ crc_table[idx];
        #else
        uint8_t idx = (uint8_t)((crc >> 56) ^ data[i]);
        crc = (crc << 8) ^ crc_table[idx];
        #endif
    }
    return crc ^ 0x0000000000000000;
}

About CRC-64/REDIS

CRC-64/REDIS is the reflected 64-bit CRC used by Redis Cluster for key slot hashing and RDB verification.

CRC-64/REDIS is a 64-bit CRC model defined by polynomial 0xAD93D23594C935A9, an initial register value of 0x0000000000000000, and final XOR 0x0000000000000000. It processes reflected input bytes and reports a reflected output.

Documented application context for this model includes Redis Cluster, RDB persistence, Key slot hashing. The calculator above applies this exact parameter set to the current input; the published Check value below is instead the fixed verification result for ASCII 123456789.

Standard test vector

CRC implementations are commonly verified with the ASCII input 123456789.

Input format
ASCII
Input
123456789
Expected CRC
0xE9C6D914C4B8D9CA

Model characteristics

A model is identified by its complete parameter set, not its polynomial alone.

Bit order
Reflected
Register start
0x0000000000000000
Final XOR
0x0000000000000000
Published check
0xE9C6D914C4B8D9CA

Implementation checks for CRC-64/REDIS

  • Use a 64-bit register and polynomial 0xAD93D23594C935A9.
  • Initialize the register to 0x0000000000000000 and use XorOut 0x0000000000000000 exactly as listed; changing either value defines a different model.
  • Verify the implementation with ASCII “123456789”; the expected result is 0xE9C6D914C4B8D9CA.

Continue with the main calculator, browse the algorithm catalog, compare models in the Algorithm Reference section, or generate a lookup table.

Complete CRC-64/REDIS parameters

CRC parameter guide
ParameterValueMeaningReference
Width64 bitsCRC register and result widthRead guide
Poly0xAD93D23594C935A9Generator polynomial without the leading termRead guide
Init0x0000000000000000Initial CRC register valueRead guide
RefInYesReflect each input byte before processingRead guide
RefOutYesReflect the register before XOR OutRead guide
XorOut0x0000000000000000Final value XORed with the CRC registerRead guide
Check0xE9C6D914C4B8D9CACRC of ASCII “123456789”Read guide
ResidueNot listedExpected residue after appending a valid CRCRead guide
AliasesRedis CRC-64CRC-64/JONES

Where CRC-64/REDIS is used

  • 01Redis Cluster
  • 02RDB persistence
  • 03Key slot hashing

CRC-64/REDIS FAQ

What is the check value for CRC-64/REDIS?

For the standard ASCII test input 123456789, the check value of CRC-64/REDIS is 0xE9C6D914C4B8D9CA.

What polynomial does CRC-64/REDIS use?

CRC-64/REDIS uses the 64-bit polynomial 0xAD93D23594C935A9.

Does CRC-64/REDIS use reflected input and output?

For CRC-64/REDIS, RefIn is Yes and RefOut is Yes.

What is CRC-64/REDIS commonly confused with?

The closest published model by parameter overlap is CRC-64/MS, differing from CRC-64/REDIS in polynomial and initial value.