Parity checks
X-checks 255 (max weight 6) · Z-checks 255 (max weight 6)
H_X (255 checks, sparse supports)
[0, 11, 107, 113, 255, 256]
[1, 12, 108, 114, 256, 257]
[2, 13, 109, 115, 257, 258]
[3, 14, 110, 116, 258, 259]
[0, 4, 111, 117, 259, 260]
[1, 5, 112, 118, 260, 261]
[2, 6, 113, 119, 261, 262]
[3, 7, 105, 114, 262, 263]
[4, 8, 106, 115, 263, 264]
[5, 9, 107, 116, 264, 265]
[6, 10, 108, 117, 265, 266]
[7, 11, 109, 118, 266, 267]
[8, 12, 110, 119, 267, 268]
[9, 13, 105, 111, 268, 269]
[10, 14, 106, 112, 255, 269]
[15, 26, 122, 128, 270, 271]
[16, 27, 123, 129, 271, 272]
[17, 28, 124, 130, 272, 273]
[18, 29, 125, 131, 273, 274]
[15, 19, 126, 132, 274, 275]
[16, 20, 127, 133, 275, 276]
[17, 21, 128, 134, 276, 277]
[18, 22, 120, 129, 277, 278]
[19, 23, 121, 130, 278, 279]
[20, 24, 122, 131, 279, 280]
[21, 25, 123, 132, 280, 281]
[22, 26, 124, 133, 281, 282]
[23, 27, 125, 134, 282, 283]
[24, 28, 120, 126, 283, 284]
[25, 29, 121, 127, 270, 284]
[30, 41, 137, 143, 285, 286]
[31, 42, 138, 144, 286, 287]
[32, 43, 139, 145, 287, 288]
[33, 44, 140, 146, 288, 289]
[30, 34, 141, 147, 289, 290]
[31, 35, 142, 148, 290, 291]
[32, 36, 143, 149, 291, 292]
[33, 37, 135, 144, 292, 293]
[34, 38, 136, 145, 293, 294]
[35, 39, 137, 146, 294, 295]
[36, 40, 138, 147, 295, 296]
[37, 41, 139, 148, 296, 297]
[38, 42, 140, 149, 297, 298]
[39, 43, 135, 141, 298, 299]
[40, 44, 136, 142, 285, 299]
[45, 56, 152, 158, 300, 301]
[46, 57, 153, 159, 301, 302]
[47, 58, 154, 160, 302, 303]
[48, 59, 155, 161, 303, 304]
[45, 49, 156, 162, 304, 305]
[46, 50, 157, 163, 305, 306]
[47, 51, 158, 164, 306, 307]
[48, 52, 150, 159, 307, 308]
[49, 53, 151, 160, 308, 309]
[50, 54, 152, 161, 309, 310]
[51, 55, 153, 162, 310, 311]
[52, 56, 154, 163, 311, 312]
[53, 57, 155, 164, 312, 313]
[54, 58, 150, 156, 313, 314]
[55, 59, 151, 157, 300, 314]
[60, 71, 167, 173, 315, 316]
[61, 72, 168, 174, 316, 317]
[62, 73, 169, 175, 317, 318]
[63, 74, 170, 176, 318, 319]
[60, 64, 171, 177, 319, 320]
[61, 65, 172, 178, 320, 321]
[62, 66, 173, 179, 321, 322]
[63, 67, 165, 174, 322, 323]
[64, 68, 166, 175, 323, 324]
[65, 69, 167, 176, 324, 325]
[66, 70, 168, 177, 325, 326]
[67, 71, 169, 178, 326, 327]
[68, 72, 170, 179, 327, 328]
[69, 73, 165, 171, 328, 329]
[70, 74, 166, 172, 315, 329]
[75, 86, 182, 188, 330, 331]
[76, 87, 183, 189, 331, 332]
[77, 88, 184, 190, 332, 333]
[78, 89, 185, 191, 333, 334]
[75, 79, 186, 192, 334, 335]
[76, 80, 187, 193, 335, 336]
[77, 81, 188, 194, 336, 337]
[78, 82, 180, 189, 337, 338]
[79, 83, 181, 190, 338, 339]
[80, 84, 182, 191, 339, 340]
[81, 85, 183, 192, 340, 341]
[82, 86, 184, 193, 341, 342]
[83, 87, 185, 194, 342, 343]
[84, 88, 180, 186, 343, 344]
[85, 89, 181, 187, 330, 344]
[90, 101, 197, 203, 345, 346]
[91, 102, 198, 204, 346, 347]
[92, 103, 199, 205, 347, 348]
[93, 104, 200, 206, 348, 349]
[90, 94, 201, 207, 349, 350]
[91, 95, 202, 208, 350, 351]
[92, 96, 203, 209, 351, 352]
[93, 97, 195, 204, 352, 353]
[94, 98, 196, 205, 353, 354]
[95, 99, 197, 206, 354, 355]
[96, 100, 198, 207, 355, 356]
[97, 101, 199, 208, 356, 357]
[98, 102, 200, 209, 357, 358]
[99, 103, 195, 201, 358, 359]
[100, 104, 196, 202, 345, 359]
[105, 116, 212, 218, 360, 361]
[106, 117, 213, 219, 361, 362]
[107, 118, 214, 220, 362, 363]
[108, 119, 215, 221, 363, 364]
[105, 109, 216, 222, 364, 365]
[106, 110, 217, 223, 365, 366]
[107, 111, 218, 224, 366, 367]
[108, 112, 210, 219, 367, 368]
[109, 113, 211, 220, 368, 369]
[110, 114, 212, 221, 369, 370]
[111, 115, 213, 222, 370, 371]
[112, 116, 214, 223, 371, 372]
[113, 117, 215, 224, 372, 373]
[114, 118, 210, 216, 373, 374]
[115, 119, 211, 217, 360, 374]
[120, 131, 227, 233, 375, 376]
[121, 132, 228, 234, 376, 377]
[122, 133, 229, 235, 377, 378]
[123, 134, 230, 236, 378, 379]
[120, 124, 231, 237, 379, 380]
[121, 125, 232, 238, 380, 381]
[122, 126, 233, 239, 381, 382]
[123, 127, 225, 234, 382, 383]
[124, 128, 226, 235, 383, 384]
[125, 129, 227, 236, 384, 385]
[126, 130, 228, 237, 385, 386]
[127, 131, 229, 238, 386, 387]
[128, 132, 230, 239, 387, 388]
[129, 133, 225, 231, 388, 389]
[130, 134, 226, 232, 375, 389]
[135, 146, 242, 248, 390, 391]
[136, 147, 243, 249, 391, 392]
[137, 148, 244, 250, 392, 393]
[138, 149, 245, 251, 393, 394]
[135, 139, 246, 252, 394, 395]
[136, 140, 247, 253, 395, 396]
[137, 141, 248, 254, 396, 397]
[138, 142, 240, 249, 397, 398]
[139, 143, 241, 250, 398, 399]
[140, 144, 242, 251, 399, 400]
[141, 145, 243, 252, 400, 401]
[142, 146, 244, 253, 401, 402]
[143, 147, 245, 254, 402, 403]
[144, 148, 240, 246, 403, 404]
[145, 149, 241, 247, 390, 404]
[2, 8, 150, 161, 405, 406]
[3, 9, 151, 162, 406, 407]
[4, 10, 152, 163, 407, 408]
[5, 11, 153, 164, 408, 409]
[6, 12, 150, 154, 409, 410]
[7, 13, 151, 155, 410, 411]
[8, 14, 152, 156, 411, 412]
[0, 9, 153, 157, 412, 413]
[1, 10, 154, 158, 413, 414]
[2, 11, 155, 159, 414, 415]
[3, 12, 156, 160, 415, 416]
[4, 13, 157, 161, 416, 417]
[5, 14, 158, 162, 417, 418]
[0, 6, 159, 163, 418, 419]
[1, 7, 160, 164, 405, 419]
[17, 23, 165, 176, 420, 421]
[18, 24, 166, 177, 421, 422]
[19, 25, 167, 178, 422, 423]
[20, 26, 168, 179, 423, 424]
[21, 27, 165, 169, 424, 425]
[22, 28, 166, 170, 425, 426]
[23, 29, 167, 171, 426, 427]
[15, 24, 168, 172, 427, 428]
[16, 25, 169, 173, 428, 429]
[17, 26, 170, 174, 429, 430]
[18, 27, 171, 175, 430, 431]
[19, 28, 172, 176, 431, 432]
[20, 29, 173, 177, 432, 433]
[15, 21, 174, 178, 433, 434]
[16, 22, 175, 179, 420, 434]
[32, 38, 180, 191, 435, 436]
[33, 39, 181, 192, 436, 437]
[34, 40, 182, 193, 437, 438]
[35, 41, 183, 194, 438, 439]
[36, 42, 180, 184, 439, 440]
[37, 43, 181, 185, 440, 441]
[38, 44, 182, 186, 441, 442]
[30, 39, 183, 187, 442, 443]
[31, 40, 184, 188, 443, 444]
[32, 41, 185, 189, 444, 445]
[33, 42, 186, 190, 445, 446]
[34, 43, 187, 191, 446, 447]
[35, 44, 188, 192, 447, 448]
[30, 36, 189, 193, 448, 449]
[31, 37, 190, 194, 435, 449]
[47, 53, 195, 206, 450, 451]
[48, 54, 196, 207, 451, 452]
[49, 55, 197, 208, 452, 453]
[50, 56, 198, 209, 453, 454]
[51, 57, 195, 199, 454, 455]
[52, 58, 196, 200, 455, 456]
[53, 59, 197, 201, 456, 457]
[45, 54, 198, 202, 457, 458]
[46, 55, 199, 203, 458, 459]
[47, 56, 200, 204, 459, 460]
[48, 57, 201, 205, 460, 461]
[49, 58, 202, 206, 461, 462]
[50, 59, 203, 207, 462, 463]
[45, 51, 204, 208, 463, 464]
[46, 52, 205, 209, 450, 464]
[62, 68, 210, 221, 465, 466]
[63, 69, 211, 222, 466, 467]
[64, 70, 212, 223, 467, 468]
[65, 71, 213, 224, 468, 469]
[66, 72, 210, 214, 469, 470]
[67, 73, 211, 215, 470, 471]
[68, 74, 212, 216, 471, 472]
[60, 69, 213, 217, 472, 473]
[61, 70, 214, 218, 473, 474]
[62, 71, 215, 219, 474, 475]
[63, 72, 216, 220, 475, 476]
[64, 73, 217, 221, 476, 477]
[65, 74, 218, 222, 477, 478]
[60, 66, 219, 223, 478, 479]
[61, 67, 220, 224, 465, 479]
[77, 83, 225, 236, 480, 481]
[78, 84, 226, 237, 481, 482]
[79, 85, 227, 238, 482, 483]
[80, 86, 228, 239, 483, 484]
[81, 87, 225, 229, 484, 485]
[82, 88, 226, 230, 485, 486]
[83, 89, 227, 231, 486, 487]
[75, 84, 228, 232, 487, 488]
[76, 85, 229, 233, 488, 489]
[77, 86, 230, 234, 489, 490]
[78, 87, 231, 235, 490, 491]
[79, 88, 232, 236, 491, 492]
[80, 89, 233, 237, 492, 493]
[75, 81, 234, 238, 493, 494]
[76, 82, 235, 239, 480, 494]
[92, 98, 240, 251, 495, 496]
[93, 99, 241, 252, 496, 497]
[94, 100, 242, 253, 497, 498]
[95, 101, 243, 254, 498, 499]
[96, 102, 240, 244, 499, 500]
[97, 103, 241, 245, 500, 501]
[98, 104, 242, 246, 501, 502]
[90, 99, 243, 247, 502, 503]
[91, 100, 244, 248, 503, 504]
[92, 101, 245, 249, 504, 505]
[93, 102, 246, 250, 505, 506]
[94, 103, 247, 251, 506, 507]
[95, 104, 248, 252, 507, 508]
[90, 96, 249, 253, 508, 509]
[91, 97, 250, 254, 495, 509]
H_Z (255 checks, sparse supports)
[0, 14, 255, 259, 412, 418]
[0, 1, 256, 260, 413, 419]
[1, 2, 257, 261, 405, 414]
[2, 3, 258, 262, 406, 415]
[3, 4, 259, 263, 407, 416]
[4, 5, 260, 264, 408, 417]
[5, 6, 261, 265, 409, 418]
[6, 7, 262, 266, 410, 419]
[7, 8, 263, 267, 405, 411]
[8, 9, 264, 268, 406, 412]
[9, 10, 265, 269, 407, 413]
[10, 11, 255, 266, 408, 414]
[11, 12, 256, 267, 409, 415]
[12, 13, 257, 268, 410, 416]
[13, 14, 258, 269, 411, 417]
[15, 29, 270, 274, 427, 433]
[15, 16, 271, 275, 428, 434]
[16, 17, 272, 276, 420, 429]
[17, 18, 273, 277, 421, 430]
[18, 19, 274, 278, 422, 431]
[19, 20, 275, 279, 423, 432]
[20, 21, 276, 280, 424, 433]
[21, 22, 277, 281, 425, 434]
[22, 23, 278, 282, 420, 426]
[23, 24, 279, 283, 421, 427]
[24, 25, 280, 284, 422, 428]
[25, 26, 270, 281, 423, 429]
[26, 27, 271, 282, 424, 430]
[27, 28, 272, 283, 425, 431]
[28, 29, 273, 284, 426, 432]
[30, 44, 285, 289, 442, 448]
[30, 31, 286, 290, 443, 449]
[31, 32, 287, 291, 435, 444]
[32, 33, 288, 292, 436, 445]
[33, 34, 289, 293, 437, 446]
[34, 35, 290, 294, 438, 447]
[35, 36, 291, 295, 439, 448]
[36, 37, 292, 296, 440, 449]
[37, 38, 293, 297, 435, 441]
[38, 39, 294, 298, 436, 442]
[39, 40, 295, 299, 437, 443]
[40, 41, 285, 296, 438, 444]
[41, 42, 286, 297, 439, 445]
[42, 43, 287, 298, 440, 446]
[43, 44, 288, 299, 441, 447]
[45, 59, 300, 304, 457, 463]
[45, 46, 301, 305, 458, 464]
[46, 47, 302, 306, 450, 459]
[47, 48, 303, 307, 451, 460]
[48, 49, 304, 308, 452, 461]
[49, 50, 305, 309, 453, 462]
[50, 51, 306, 310, 454, 463]
[51, 52, 307, 311, 455, 464]
[52, 53, 308, 312, 450, 456]
[53, 54, 309, 313, 451, 457]
[54, 55, 310, 314, 452, 458]
[55, 56, 300, 311, 453, 459]
[56, 57, 301, 312, 454, 460]
[57, 58, 302, 313, 455, 461]
[58, 59, 303, 314, 456, 462]
[60, 74, 315, 319, 472, 478]
[60, 61, 316, 320, 473, 479]
[61, 62, 317, 321, 465, 474]
[62, 63, 318, 322, 466, 475]
[63, 64, 319, 323, 467, 476]
[64, 65, 320, 324, 468, 477]
[65, 66, 321, 325, 469, 478]
[66, 67, 322, 326, 470, 479]
[67, 68, 323, 327, 465, 471]
[68, 69, 324, 328, 466, 472]
[69, 70, 325, 329, 467, 473]
[70, 71, 315, 326, 468, 474]
[71, 72, 316, 327, 469, 475]
[72, 73, 317, 328, 470, 476]
[73, 74, 318, 329, 471, 477]
[75, 89, 330, 334, 487, 493]
[75, 76, 331, 335, 488, 494]
[76, 77, 332, 336, 480, 489]
[77, 78, 333, 337, 481, 490]
[78, 79, 334, 338, 482, 491]
[79, 80, 335, 339, 483, 492]
[80, 81, 336, 340, 484, 493]
[81, 82, 337, 341, 485, 494]
[82, 83, 338, 342, 480, 486]
[83, 84, 339, 343, 481, 487]
[84, 85, 340, 344, 482, 488]
[85, 86, 330, 341, 483, 489]
[86, 87, 331, 342, 484, 490]
[87, 88, 332, 343, 485, 491]
[88, 89, 333, 344, 486, 492]
[90, 104, 345, 349, 502, 508]
[90, 91, 346, 350, 503, 509]
[91, 92, 347, 351, 495, 504]
[92, 93, 348, 352, 496, 505]
[93, 94, 349, 353, 497, 506]
[94, 95, 350, 354, 498, 507]
[95, 96, 351, 355, 499, 508]
[96, 97, 352, 356, 500, 509]
[97, 98, 353, 357, 495, 501]
[98, 99, 354, 358, 496, 502]
[99, 100, 355, 359, 497, 503]
[100, 101, 345, 356, 498, 504]
[101, 102, 346, 357, 499, 505]
[102, 103, 347, 358, 500, 506]
[103, 104, 348, 359, 501, 507]
[105, 119, 262, 268, 360, 364]
[105, 106, 263, 269, 361, 365]
[106, 107, 255, 264, 362, 366]
[107, 108, 256, 265, 363, 367]
[108, 109, 257, 266, 364, 368]
[109, 110, 258, 267, 365, 369]
[110, 111, 259, 268, 366, 370]
[111, 112, 260, 269, 367, 371]
[112, 113, 255, 261, 368, 372]
[113, 114, 256, 262, 369, 373]
[114, 115, 257, 263, 370, 374]
[115, 116, 258, 264, 360, 371]
[116, 117, 259, 265, 361, 372]
[117, 118, 260, 266, 362, 373]
[118, 119, 261, 267, 363, 374]
[120, 134, 277, 283, 375, 379]
[120, 121, 278, 284, 376, 380]
[121, 122, 270, 279, 377, 381]
[122, 123, 271, 280, 378, 382]
[123, 124, 272, 281, 379, 383]
[124, 125, 273, 282, 380, 384]
[125, 126, 274, 283, 381, 385]
[126, 127, 275, 284, 382, 386]
[127, 128, 270, 276, 383, 387]
[128, 129, 271, 277, 384, 388]
[129, 130, 272, 278, 385, 389]
[130, 131, 273, 279, 375, 386]
[131, 132, 274, 280, 376, 387]
[132, 133, 275, 281, 377, 388]
[133, 134, 276, 282, 378, 389]
[135, 149, 292, 298, 390, 394]
[135, 136, 293, 299, 391, 395]
[136, 137, 285, 294, 392, 396]
[137, 138, 286, 295, 393, 397]
[138, 139, 287, 296, 394, 398]
[139, 140, 288, 297, 395, 399]
[140, 141, 289, 298, 396, 400]
[141, 142, 290, 299, 397, 401]
[142, 143, 285, 291, 398, 402]
[143, 144, 286, 292, 399, 403]
[144, 145, 287, 293, 400, 404]
[145, 146, 288, 294, 390, 401]
[146, 147, 289, 295, 391, 402]
[147, 148, 290, 296, 392, 403]
[148, 149, 291, 297, 393, 404]
[150, 164, 307, 313, 405, 409]
[150, 151, 308, 314, 406, 410]
[151, 152, 300, 309, 407, 411]
[152, 153, 301, 310, 408, 412]
[153, 154, 302, 311, 409, 413]
[154, 155, 303, 312, 410, 414]
[155, 156, 304, 313, 411, 415]
[156, 157, 305, 314, 412, 416]
[157, 158, 300, 306, 413, 417]
[158, 159, 301, 307, 414, 418]
[159, 160, 302, 308, 415, 419]
[160, 161, 303, 309, 405, 416]
[161, 162, 304, 310, 406, 417]
[162, 163, 305, 311, 407, 418]
[163, 164, 306, 312, 408, 419]
[165, 179, 322, 328, 420, 424]
[165, 166, 323, 329, 421, 425]
[166, 167, 315, 324, 422, 426]
[167, 168, 316, 325, 423, 427]
[168, 169, 317, 326, 424, 428]
[169, 170, 318, 327, 425, 429]
[170, 171, 319, 328, 426, 430]
[171, 172, 320, 329, 427, 431]
[172, 173, 315, 321, 428, 432]
[173, 174, 316, 322, 429, 433]
[174, 175, 317, 323, 430, 434]
[175, 176, 318, 324, 420, 431]
[176, 177, 319, 325, 421, 432]
[177, 178, 320, 326, 422, 433]
[178, 179, 321, 327, 423, 434]
[180, 194, 337, 343, 435, 439]
[180, 181, 338, 344, 436, 440]
[181, 182, 330, 339, 437, 441]
[182, 183, 331, 340, 438, 442]
[183, 184, 332, 341, 439, 443]
[184, 185, 333, 342, 440, 444]
[185, 186, 334, 343, 441, 445]
[186, 187, 335, 344, 442, 446]
[187, 188, 330, 336, 443, 447]
[188, 189, 331, 337, 444, 448]
[189, 190, 332, 338, 445, 449]
[190, 191, 333, 339, 435, 446]
[191, 192, 334, 340, 436, 447]
[192, 193, 335, 341, 437, 448]
[193, 194, 336, 342, 438, 449]
[195, 209, 352, 358, 450, 454]
[195, 196, 353, 359, 451, 455]
[196, 197, 345, 354, 452, 456]
[197, 198, 346, 355, 453, 457]
[198, 199, 347, 356, 454, 458]
[199, 200, 348, 357, 455, 459]
[200, 201, 349, 358, 456, 460]
[201, 202, 350, 359, 457, 461]
[202, 203, 345, 351, 458, 462]
[203, 204, 346, 352, 459, 463]
[204, 205, 347, 353, 460, 464]
[205, 206, 348, 354, 450, 461]
[206, 207, 349, 355, 451, 462]
[207, 208, 350, 356, 452, 463]
[208, 209, 351, 357, 453, 464]
[210, 224, 367, 373, 465, 469]
[210, 211, 368, 374, 466, 470]
[211, 212, 360, 369, 467, 471]
[212, 213, 361, 370, 468, 472]
[213, 214, 362, 371, 469, 473]
[214, 215, 363, 372, 470, 474]
[215, 216, 364, 373, 471, 475]
[216, 217, 365, 374, 472, 476]
[217, 218, 360, 366, 473, 477]
[218, 219, 361, 367, 474, 478]
[219, 220, 362, 368, 475, 479]
[220, 221, 363, 369, 465, 476]
[221, 222, 364, 370, 466, 477]
[222, 223, 365, 371, 467, 478]
[223, 224, 366, 372, 468, 479]
[225, 239, 382, 388, 480, 484]
[225, 226, 383, 389, 481, 485]
[226, 227, 375, 384, 482, 486]
[227, 228, 376, 385, 483, 487]
[228, 229, 377, 386, 484, 488]
[229, 230, 378, 387, 485, 489]
[230, 231, 379, 388, 486, 490]
[231, 232, 380, 389, 487, 491]
[232, 233, 375, 381, 488, 492]
[233, 234, 376, 382, 489, 493]
[234, 235, 377, 383, 490, 494]
[235, 236, 378, 384, 480, 491]
[236, 237, 379, 385, 481, 492]
[237, 238, 380, 386, 482, 493]
[238, 239, 381, 387, 483, 494]
[240, 254, 397, 403, 495, 499]
[240, 241, 398, 404, 496, 500]
[241, 242, 390, 399, 497, 501]
[242, 243, 391, 400, 498, 502]
[243, 244, 392, 401, 499, 503]
[244, 245, 393, 402, 500, 504]
[245, 246, 394, 403, 501, 505]
[246, 247, 395, 404, 502, 506]
[247, 248, 390, 396, 503, 507]
[248, 249, 391, 397, 504, 508]
[249, 250, 392, 398, 505, 509]
[250, 251, 393, 399, 495, 506]
[251, 252, 394, 400, 496, 507]
[252, 253, 395, 401, 497, 508]
[253, 254, 396, 402, 498, 509]