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Label Polynomial Discriminant Galois group Class group Regulator
21.21.472...224.1 $x^{21} - 3 x^{20} - 57 x^{19} + 208 x^{18} + 1017 x^{17} - 4470 x^{16} - 6390 x^{15} + 37887 x^{14} + 15282 x^{13} - 158528 x^{12} - 1233 x^{11} + 354021 x^{10} - 59437 x^{9} - 428406 x^{8} + 104895 x^{7} + 270894 x^{6} - 71394 x^{5} - 79299 x^{4} + 18503 x^{3} + 7767 x^{2} - 1188 x - 19$ $2^{18}\cdot 3^{28}\cdot 31^{12}$ $C_{21}:C_3$ (as 21T7) trivial $741765605490$
21.21.710...656.1 $x^{21} - 8 x^{20} - 26 x^{19} + 362 x^{18} - 210 x^{17} - 5560 x^{16} + 10446 x^{15} + 37382 x^{14} - 105928 x^{13} - 111352 x^{12} + 494124 x^{11} + 77632 x^{10} - 1188672 x^{9} + 302096 x^{8} + 1451596 x^{7} - 663064 x^{6} - 803144 x^{5} + 470904 x^{4} + 128848 x^{3} - 105968 x^{2} + 12440 x + 104$ $2^{18}\cdot 7^{14}\cdot 43^{12}$ $C_{21}:C_3$ (as 21T7) trivial $713026797535$
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