Block 539842
- hash
- 000000000000000000000bb69ebdd490250b85ff7019d12f8ad9b04b3fade223
- target
- 00000000000000000029d72d0000000000000000000000000000000000000000
- timestamp
- size
- 1140805
- weight
- 3993790
- previous blockhash
- 0000000000000000001cb985f95595ff2d38cd32aeab14bf2929bf3f605d599d
0 Runes
0 Inscriptions
226 Transactions
- 256ee3f9c638bbf027cb6bfea73e7ec7a6b248262688634b058d0b905f15117a
- 56bb3f0f18dd5173ebe1f0e4c817d5fb9ccee61b26aa4134620b658187e2481b
- 0eac04ec838007cf5f1a3f0d29a7cb77089592d453fd8c10207f52d1a5f3ff79
- 9e8fcfbac1a974cc192cebb0270d4f5745f1472fe80165f9b9947ad8ae12bfa5
- 9e752294f2dbe31d5064bc5d4bbbf7d7b484aff850b3e651d5c67d1fdc1bfa7b
- dfac74877c84bb46cc5cc9887128e8434d0afe519f9059c3df833c2f17f29db9
- 2a5c703fcff442e38dfe6f16144ea72a6e695fd688cbce3acdd760eb77ac9248
- 0765af12920cc4c2d27e419a5ef89dc6d3e4d3941b70ab707c45f6c2a81e43eb
- cc5317d913c90d9794e7742d9ac17d504d7c353db44ab6ef0602b3dde8b3dcf8
- d7c869feb1e08ee42959c199a79d3f1f44f8beb1a22eb7e3ec945d3a7e32f655
- 6f60578bea17d354fa31ad6c2ebd9369d4deae70b695f536dd225241ef59940f
- b5f7682f84babd18158590c1b269ca0564a94b81cfdcec5415f9c653e30af534
- 87f96a144614e427584f718aaddd3e79eb9efa6cf8f68803eba415539dc116dc
- 03189e381d27c2fe80c295e53d4448c097475f61ad5def95246c142b51f0df02
- 987c86748dd5ef2650ea045d4d7ce956fa61476e533c7da82d274122d5ec1446
- 2d24997b35cec235941c35795ccde6fbba50b2a66dddeedafad133dd48c79ea5
- 427b399e5f59ad68d9110b340edbc7c34aa2a9fa0510216389730849c670bc66
- d39dab0385625baacbe17ca93036d25fc135888180218491dcb3ac7f5543f2af
- cf718910c4a5ed546e8c12c645ea2b69feafc00fcc166e082bffbce18bc8fb79
- 0b3fbd583634d24f41273ad9fdcb58cd4b7f8a210f2d9fb9a167fc3c453793fb
- f02dc1325bbd10b95676124b5342544752d30a9b5610f77e6f321de9cd8a3f1b
- d6f1aaf2b58ff30e88c9e06b0e914fbfe2a0b77d0dd6e19750d6d13e77780c2c
- 323b1267dc75882b71cbf21ee56612d6547d7cb839a466ae43254283fc504947
- 6256db1f97e938401e26846219972cf4c7826d726f6a0c79831cd6dabdf8c07b
- d3fd5381cda74ddcda23fa25774f5284c939325ce25e2e18cda096a3a5a2213c
- e0bafcc56592a7ff1ada9481a3d4e65228fa116b5504b32fe0375ddce80960d0
- b4721dd5d19d11a23b21e0dac12782b428994209b76168cc2c76fe1aba38f0d0
- 5a7b1e8e2ecd05f0d09201a2230e39ba4184730cddaa19371c05be7f2f3dec0a
- 0361f0e790b56cbda8a3d2e45db238b47191f20cf350801bd7b7b89c8c7480c9
- 0fbb3a0bdccfbaf50030157e933e1d3bcb8f13cce6d0c50f28c8d907526a229f
- 1c32390114d24ed40e86f7193f64ddb46b12048936a48bacd13c8d88407f53d5
- 748ec38681a32463d486681b1ca884fee300086cd52ae40528ac80e129875d20
- 2a5e02fdd7b13359c1229f323224cadc6afbbcca82c621ed88851dbfe39fc590
- b290f7e681ebc0b0a4556c43680db4d02cf5932b78f65cc49414d043970d3589
- 9d815225696f57452f160fa8c480cf6b8452b679c7e454b41911755959716fe1
- 2e2027aab3c22a3d4c648099bc639ad3dd4ad43fdc465d5e08ed711252e0fd03
- 6c5851630d60aba8b28c924def9a5918a8cfe7e6610429aecb407dc22038076b
- a0dbbec43e75ac3dbcd69efa7b35a10e47fc5fd18add118412962a4a2ceb66ab
- 0af850fdd8934c9d594489f1b3be591791a09e578081c5b41837e8911e91746c
- 1402fa21b4db8a5413154acfd8d49e8d02f50fa0a969ca8c223807a5c5ce2e82
- 4d8b03381cb390b0d6c88ea5a6bfa5caaf96d7ec3704901844f199862acc3e27
- a5a7d5aa4fac8b391197d78325d3379fd6473489f0b59f06cebfa1a4097dcc2b
- e4045e2b8a9866c6ba5a06ab33d249cc0a0fae74deda5887cf621a49522fe928
- cec70f41df1908541b15b7da19bc7078edbad8f37dd73ae11710a3c3b965a8a7
- 1f10179ed04880cfa6d3f62acb110fa7826f73f705ad9366d2de69b45e30bb24
- 3d3cedb8bd919d71c4c4120cdcffdde1591501e5ea489bab712a3c7cb057cec6
- f2f4d669ea42b2fb1a70c895c7ffab3e6d0a45ed0b999eb28f34c0f27e9b5b4b
- 1c8601f94e28b29fee540309f9ef9cd2832b28160d942c94162dde7e27955e1a
- 819c43453be9633169ab64b595f49029b4f520a76ef29ec28cd4514d96caeb1c
- 7c19aa3140501a9ad2396cb3f526606a313c5f7467f86331dc196c1d45737dfc
- b945c33d542294948cad126987b3ae9aebb2f99184132a9b29fc13507a1ecef3
- 8e8ee6d443872a3e3017c905e05ddb31a34cda70d1ec924e858d0fea8c77d79f
- 25e2385421ffba9c01c3f1d00c8c9f6e7b38dfe00694c9ffd0e6f30b5f856fb2
- f3bca9aa2c9aa71397c87c08f44f9075562702c67261c72476718bb3f03bd8c6
- 6d122707f45b37c44b1957ec989ae6dc433a1b793dd6d935418132d2d7780cab
- 28dc80d2e6cab4d4c19ccdacd98c3e1318a7477165c6b6e6449257de919e1cbe
- ea75ab2a89f0b54b40a6bc1b5176d292d5cf5c7f08878e2794f0810b8b89bdc4
- 16d434403ea81bfda21be15aa617687478c8dd23c54241d86c78d30c4e0c4879
- 811c7cd2e76c440922bdb1e828356907ade93910bec05bd51a2900c07a0928bf
- 0e4869dcc753e9c49ff69ff3ffe4a2b3ac831c7e35f6a72e7f77abd87c4f106d
- 38d7d8f0cb4091983183978135c0eb0432c6ff1d7a06433c837bff0bae4284e7
- 7d247dff3921bb5b7e2faadddb5a5f41e254bdca7277d7127e967039238dd93a
- a6fc64efd31c0fb9905e4cf02e89649f19aee72128ae78bc27428e0857bec69d
- 34e7adc8349eafda499362d6f2dfac83c161e1bc0fa2eac44029fe204872ee56
- 79084c3721b0e3c0103a65bf0fc5008d1758e3d8709d844a95fe24f94a252123
- c42d40d559cf7e9f2949e34009ef50aec571e905ec7e7c6c8735c5300e41e473
- cc6198791220aca6c74bd75ad7a17e50e788a26bbd8079e1556bbadf025ba0f9
- d1620475837c28da9a87fafb5bb0dea99972c6f7d08af41e6e8ed631ca6a50e4
- 348806931f34afbc566ea129cbcc75ff147a3d2e9d283761de35503a281afde3
- 0cbee36295ae686d9daa4038743e23b60e81c8ccdfc6d24bccc38b099fe62f3a
- ae4cc9f9497812363a5d16fc27ae575787f1d61a1e9cce52a6d3b39fe2015ccd
- fda386561d45271dae0e5ff19c36d952dbfb0bed96aa19535e10e3a62fe7c1ef
- cbd59b612f1f49fe1f709a8f67688b51eadf9d9f85bce99d25ac250651edc643
- 3ce28c0a1a4fc886b57045d5573a0ab88f768b563bd1a2f0d114652534c52252
- 885aafcb3034dc447b408405aee3845799f1b3f9f6057cad0ebd240233b7519b
- 65358196551183580377bdc3d1546c216df764a9fbae2c69cea348e3c499ac82
- 2142bf54525e356aa82837716b2513d1b43aaaf74b41332869078ff8a728dcad
- 104230b601f3e506923cbafdcd4cf89b37e69eedb0c303f09aea57fa49cbf1c1
- fdbb4d05ad651acef5b008bbf21dca7b560e6436e8d835383c831fa3f7bdf9e8
- ea6db873d65829a717ab64e4014f2e86a6b06198947ca46852d2c8a7fe2f9c3b
- f2676b7dcedd6d0b8208f7449b07fa1de26ef2bd80a608773f88d4327e5fce7f
- df36a262cc8974d0231d02eb2cbc601bbc4f3bb4dc3d7c913c708723384aa878
- 17a7d2e2960eda677cec6120428eedcd59ccb5e83a809853035aef87781d4dd1
- 86796013f58b88b2b25423fa9c3b6653ff046768f6cc0d8b15e9b47c0dc21624
- 06ca8a162238e32d6faa32e4407f287aaea340bdeb2d9e2b356af3ccbeba5160
- 6a21eea80db1a6bcd17a4458dd7ac67026020a7fab03f83c023b76ef06dc4f31
- daf4cba6ec9ef88df4eb863831b03f6cde7daefa0395fdc85d41fc5c6d036978
- 40e3805d8a3dfd18aad875b4e896e461aa6a73e0240b68f6bc4a89305edc7dc4
- cfa94356531bc2d5103080703788cd2c1b24a50f2e5ce55555b4f6cfd36011ee
- 1122c0983b6fe5b8aa1106e5eb97b7d6b954d40116f56bb9172f3055fa2aa2fb
- c1132c490c6cdd54486ce4e3bedde79aaaca1665a50f4fde498655ac4b2d8a22
- dab68eb7f43cf13024277515375ebf32ef1ef5aad1e985e3c762040b1538c6ad
- bd86d6473e674fcf6fe04e61b9239c58914ab2e55c266078aeb1cc4dcdb60283
- 19a17b39e97c1cf130fa127c2120c4c9fd6b00fc2ad184639449cda1509bb9c9
- f160702e9ed8becf764a627f04ea331df850e23b3d4796a9efc66b7df819766b
- 785b8184288c9af5200d18a27ec1420ebabea003bcb294598693693c7d83ed42
- 516a364e86e9bc2962508c8212e9030af8d13254f28add1b37d5e3255dc15582
- 0ec49687564e03e5e9de224df4ef009d8d5b4d1a2d252593e48e091975d663de
- d6a906a012789faefa0471826e051be9037a1e4084ea4d57135e4a33b2d1766f
- ff94b74b78bf9ed79104676812c6e4c8bf22626901df60ac8bca3a07300af15b
- 3fe1d45124eb250e54d9623c17cd8a210f770ea569f89bcba5c949ccb7f97568
- 1999f435e9e09555bf68a920657b85e57a0deb17e34068579c64a3d78b312feb
- b2156a8a61e80dc49e8b213f0e4d1b71ea38c634c3259f2f053b96f636314004
- c6eba85cf31129af347e9232f4039565c677f154f09b4db653b9ca9b9359c173
- d44cb80ac9f65dc40f79f54ee77ba482e41e1fa7c01babca3e599bacfd4f5a0b
- 4290db465549ea25cf62d017a8f4ed83986140cee11fb99a9c04f8d86be6373c
- 5ca0be84c1a9cae1455d508a3d7a3c7b3ba9a0a4c718985f4370cf264146b97e
- 28dad547cd59ab1d678998d8975b6f495bbe7de5305d3b014d1ddc00124af692
- f48b5df555aa647c72a9e90b1d78ee6b4e30a219dcb14a739e6255cf4ab021e4
- b4864e02ca065765eebbac5a01c50835a5f02a1e1da6cb06c60b87108b7f766a
- 5a2b34c37f450d3e707b3309ddae3a03258db2a066b4a8920dcc280acf674318
- 52ca9f9987374a5889fd2214ff5a893e45c055dd95eff0d7e56d9109e4f18323
- f6f4639e6fdec714347f67acb191be063f1601d55c404b1e035148f9bd82ee33
- 6a7ff04058f4c82315186636f64891e067c1a1902c0498af39e7a09972c7285f
- e4519bc873cb5e23d6efb726e6f89c90fd578c18b05799e14a61822b269c9e82
- 60a025184123107320dfb54779fe2820510b554dea7a60171eada12e10f12bca
- 231fbe83e9686d9de11dac643f1714f8425efa3c9cb983c5fa9f54a27d6a2aeb
- 7fe062d048df642bc572794d29de3dfa82dd5f8ab409f90fe6ea26afe10b689b
- 5a16fbec6cfda829b1de98eba211365ed68daaea30d61fbf03dd4cbd7bcde190
- 9bd8886460de97f86433565a165a9b3e9eb12bf8e501cb29a6eeda30b6e729b2
- 2085b9e4473b7605ec92650cc851383900b522fb598b5adc8fbc87580bfb2cc9
- b614198f749876815aace9c1abad6047f110aaa17f75374bafb65efd14614b75
- 9b6a994b13b48363790b3a66441ef5b75707a7ac3b3a8d9da35bf089a1eb0397
- cc72fd3f9389021015cdf2fb4832f0742a788e2d7236ddec6f20ec996cb6de99
- 09d16bcb88772263097000bc62011574b995655c6a84c537018b475c9c56a280
- 5e3c48826bbe596d4d95c39f9f19053eea02795d182278877982853189607517
- 96030b23af39b024451f900137bb6ea605661afa229611867a331038f92ae344
- 3014b00b5d2e8b42a16b1d6a2a51aca6295e77af6754f7d6bac321875e79619f
- cd4783dcd337558d9073cea7b0349b9218841835679421eb757700f5e817e7a0
- 0c19f54bc2ded0fec5561e90508674690a2589f7a4f2915388ce83bb894bc32f
- 663837321d1a04021ce789fbb607a967af1881001ebff59d3fe51af6f42373a7
- 1bc50ea980c3d7e54fe7430fbb49adb25a7979d4a6cae4fdc788f23d30def8ee
- 791880c5cf7d8cba551d1b118950404db1210a21e7c670458507dc9daedf0712
- e00406b4a224274cf2972cb378c896411e8ab5cce22619b4da4aa3823d589b04
- 2b8dd2c9030fca3bffd78857800b8271747531bbe4a181bcb0f7aadffe3b9374
- ad3959c8206120811d5b6c6682595cb1c01e7e85c28159ca685d274dbfc2fca8
- c02819854fa3ab58620c49c405c0443c2a7298922a417b2478e6dfc0d71aa7a8
- ba5a38ced6ea5ab82ebfad8626f5b2c96909cc601240ef390e961855c245c843
- a70990107b37cb858f8b11a6e2e32b901dd80cd53a0ac0d60a98e80d754bef51
- e3ab0fe56f2503dd8896b479e247c17760f256492b2b902a2168a543fec6a39f
- e4500679ca98b46a6a71ba65d45ac5ea97305a0211b04433d3da9ed9e12c243c
- 8b41ffb524200b095d8e8099bbafd36886c874f647ace7366ee3bac3556751f3
- 147ef0238e61f3814840874d1c8cfff9df086f2d26e80fa6fa33667818a38514
- 09b169b17ae25afdb4b0226b4f90bf43555bb3c8b4e09a78bec242a6430d12ce
- 2db56bdb0fc3818198418a7b50a8f05569fd581d81748e72242e06e782b2ed5f
- 371694e4b4547dd49ac88b62ed0353379f887dde87b6f892ce1909b8b298fac0
- 451e2441fc1eb6d6d0993a31805414a2fd293ee82db661cf86501ed7d7961b63
- ba3dde684da9dc6eecd9f3442088d80b3600293b84499ec2443a7f1c3eb78ec7
- e38df7088ba6d9a7f5326491a8abb810ee5fa723c927ae741dae1e18b9185643
- 9b0cebc23471e86126cf5cc4848c3857febca68a92d1a9ed938df94847bddb16
- b008158b0c2007ddb201f2876faf6bd29671c2f5d5ee63b7e66ba794a54ebc27
- 30af2a1f2ea389b143681705e0e5a69c53da3772ff6c4bfd985d9adca662d2b3
- b10a6b1fb967f46e806ea4302f1f8e69e380b1e0940e8a6ed464f43aea846ddf
- ee275693d68ff0fa32c36e218ff859dc232bbe4cf5c0f908cb28612384967990
- c6c8c1a1278cc9dbeccfe752fa5e10f0f385436a5c2a5668e2b422ea7fe8aa92
- 8106bd90354305bf2e7338a4d51409acc0968cc390435beb674582c746cfa6dc
- 171a07c24e13b346601129900ac154ba18c99611f3898347dcca7d8121f27a01
- 611809e5eb6011608377455f68403e85eedd888865fb6aa12b3323f54756227b
- 280f42434e2aa53a81ab266bc09fa2ed58f0b1cbd560c039c8c846b9b1ebef2b
- f6031654878d2306e2bfa12a8de81c3d27d7b42eff16e2309a9e0230032e0070
- 2ed82fdb9f45ac3a69cab8da93c08c74b02301fe55a0738ae306ab1da0ebb184
- 3b4f4a2c27f34b4f79c5893090a3f6f6eee5274155aa599358f21b26e27db862
- 9445c5d09d526ee23bd8e2acdb6e653fc85bfe49cf24ac05cf825742e2672d73
- 5f63872874bc7f08d90543202cfd2b3587aa9073527cffee6bba4e980e187582
- 7600292a5e337c4ec6b34506bed19b9bb7d23df72f07f72a9b9d5a64445539aa
- 345788fc191a85e90bb39d4ec559f70d3174219cc160e66d44f565bc034cbcf7
- 19190d79695d887dd0010f14b15d6db13c64b743b915ef331045c42c108c1403
- d48e759db6c4654d429d323753a63feb70923d4de4543c43305015f9b24f3088
- 3846b65c56c37d09b6609739abf35989d10f633aeeb9ce48005bc1f80b2709aa
- 368db88cdded7baea4eeaaa5ef4dc71075630e88708a865bfc2796e6b96fa68f
- 44469ccc4a42658286d48d134fb4069765b06e9e0dc1a3df0c508cab8d99345c
- 16c94177e1e60c92d65e9ddc7d8984ccaa97aecdf5e6a4b04a8c260c61917a48
- eb7eeab2fa4943fda81633918e771f07e9390688bcff8d34ec42296ccac5239f
- c47ec1edb199961c184d774eca2d87894da3651f60c850d7a953540bf6a49bdd
- 15c10d47a7ab7eb2c09dcae261f75f582a19a3b1779f0b0cc0f7701b934a28c6
- 2e87fa11a070749d339ead4acdaf76aae7f1c384a7ba38c244a7eeed00b50d0d
- 7a0c3cf2513568599ea9397c65371bcdb1c64696e0a2c01206cc39157d313fd7
- 849333bf658b5e9eaf37ca431703b0dfa8e74f7db88531b8844e8e4c7b02c85a
- b7e6973d33058592c1f5e34933c3dbfb38227141f300facdc8cc3dbc69bb9417
- 40903d14a9b80f81a080d9c60966f83894c889f5a53eb1bf413d858c86227eb0
- 397d47fd0798a26bf94425cb8e5485d6a4b943a573801a1ec48ceb78bdf99f7f
- 074320dc69c6450aadd2a2215ad137272861e413643670d6f1ce881a1d36ff15
- 10ceb61b2fb957dc7eb13694c7ea3e22f36a85865e20e7d68fced4be33b6dab3
- 6639cd4c7e8d5fcdea202a2937717b41cdd80a90e3cf5cbb13b2bea311d30ea3
- bb3b88c9e4b0f40ba31c0521b3f90c96fcd26d72314c623950175eb84f135156
- 304f344f8cb5d22e5231e11a748064994e1ee8eba9253eeac9f2b1ec214e07ac
- c494da61c30e43ddaffad4eea7ece45d2056704bc9474759da9fef83c6f7941e
- c7c952851f5aafec1f7871a8bf2f13dfe7cd64d81bd4fcff5143a33102d56f1b
- 04b12ba97ef58066c5a266208752dd5d22d0662bb599275f23edafaefea614f0
- 74d19477f83c9e54b0d7cc0d263e78142f2f009610e694ba7f392c8bb2473a07
- 3c1d40a474b1fc5111fb3d6717c1b96b0842591151323b44500c6d9ad6771132
- b32220c5ebd69f75eeaac569fa5d223d33a894fcb19750b393cbf922c4e18b34
- 9a8cbb2a01dd7c6e62f54296f38d3594c3690d153664ae765592bdd3a97836dc
- ae7fc15b429458ae54d1c80e3492dee7950cdbb8d0523e031899a8f91afdd778
- 4a36cd3aabf0be35ec54b871ad3939bfb3d1a8f5f74c1955637483a8ea85a3a5
- c12dcfa3413ae3f7357135ed4647f6b004c137472990f0d10c827cc1e07b44c1
- 36dc74434f476e8b38d52fa2d79f6688c725b0bb782c69b0ea939f4fcba34925
- 601e8877ab669a539399974a7d4da3f55323c851bdbf0b2349f7903ae8c2a161
- a4eb7e27970ee8869efc6ee6ddbf7c1d858c0cf2641c3a023c03ab2d9fe85c8a
- 0c823d8fc1b648b5eac079753003c34d74306234efc6ad9b9d8ce973d92499e5
- 035e0220d650ea5d504c4278787bb724ae8cf63a25b6de9e483ded2c1668cbb3
- 16537f67e612d4b155957f7546d35d056426998959bb836aea3f69851825b8b1
- d6dfce360e7d9ecd9cec54ff3c5d7b74519067fb63d9e822a7909e658078ef53
- 4ad78a6fb45234311ac15d7172aee7c4ae3cb9c50f3135c813803798fab5ac5d
- 8e688554d4a8bf56d793da8ad34e6eea9c6b0aa0acfb876395cd6e4eee19a66d
- ee8e9090260bb9d93ee1da1846d513e0228ed03a460e6ba3a59103e3e977f2a8
- 5fcd9778a57007088deb9e7776974dda7e9a5949a36a1960d03f718d91f670cb
- 6ce7f68b34613e20962e95fa760fea69d39122561be82c74e6f74bff64eda538
- 163249c9eaeca30ddf784c7bcc06c28189ee83489584f31782fbd4a0b34b474b
- 44f888ce2e4c0ba0fc6a8145f1dfde8964c64b5be8eee531a61b61d2f6fcfd6d
- 8e9d7772fc9563a8e4b29518b4239e8d753217f9b9ebddb40a4bc5b8b9bdd6c2
- 3909dc7d3746a9ee8db813de649293e7cec9a24d0e7d5197f3e0cc6fc1847e52
- bec2b9bddd098ee3e8243769d1c5468fc8b11c642330ab873c21a352955b8141
- 1dfe2af0209e060805fcd6477f0686f3f726f9b41352982a0a5c68cf1d6c87b1
- e19376e438a48389e7c2008de1b6353f81cbb5ae22b4b13d8f8e3b37fab9d0e9
- f44a500f82a1d8390f2e5c8801b2b07db0fcdac1a12df94519aef48d5b556060
- 6e1d28539c0878b559d06b8bc45ffc45b0fed948c45455221f6f1382d6d798f7
- dd9f23f151ee2b974c146aa1ba5efb8b4e709b3b9375da5349765c8edd4e02de
- 6e2ca307a2ace7a359e2718d75a828c99065df31599a47b0f4c6eade3cbbb178
- 906e1e0b3eefb9c150aaa0eb43fc83333e79a552317fe936b2fbeac552b5a7bb
- a31bfc3a2ec12150553eaa90a6683f3d9c087ec4cb598267957ad135614faf99
- e29b1056963bdfd382b48aa199cd8047061160529c921af3dcfbd2f3695c21da
- cb8a000da636ea430c9c72d4662217980b37c65a2569943f2de6f33f2657887f
- 2f460d1f86fd42b1685cb78c20b6d17603fa6bf5fba80e38779212c2575a8dba
- 0eb4ecdb5b73fbc7adbbef0085512a130a2418588a8c23abeb344dba7035a7cd
- 31894134efa11c04ac597d93d37ec9c760ec18d5dd1f2a1ecec01796529fb522