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Label Polynomial Discriminant Galois group Class group Regulator
20.0.267...376.1 $x^{20} - 2 x^{19} + 6 x^{16} - 18 x^{15} + 17 x^{14} + 4 x^{13} + 25 x^{12} - 92 x^{11} + 92 x^{10} - 34 x^{9} + 44 x^{8} - 140 x^{7} + 188 x^{6} - 144 x^{5} + 88 x^{4} - 54 x^{3} + 27 x^{2} - 8 x + 1$ $2^{20}\cdot 761^{5}$ $D_5\wr C_2$ (as 20T48) trivial $99.9526828541$
20.0.287...032.1 $x^{20} - 4 x^{19} + 6 x^{18} - 4 x^{17} - 2 x^{16} + 10 x^{15} - 10 x^{14} - 12 x^{13} + 43 x^{12} - 38 x^{11} + 21 x^{10} - 38 x^{9} + 43 x^{8} - 12 x^{7} - 10 x^{6} + 10 x^{5} - 2 x^{4} - 4 x^{3} + 6 x^{2} - 4 x + 1$ $2^{30}\cdot 193^{5}$ $D_5\wr C_2$ (as 20T48) trivial $52.0455573525$
20.0.362...561.1 $x^{20} - x^{19} + 3 x^{18} - 4 x^{17} + 5 x^{16} - 7 x^{15} + 8 x^{14} - x^{13} + 8 x^{12} - 3 x^{11} + 3 x^{10} + 3 x^{9} - 13 x^{8} + 17 x^{7} + 8 x^{6} - 8 x^{5} + x^{4} + 4 x^{3} + 1$ $47^{10}\cdot 83^{2}$ $C_2\wr D_5$ (as 20T81) trivial $59.602445011$
20.0.369...048.1 $x^{20} - 7 x^{19} + 26 x^{18} - 64 x^{17} + 116 x^{16} - 153 x^{15} + 128 x^{14} - 4 x^{13} - 199 x^{12} + 398 x^{11} - 478 x^{10} + 372 x^{9} - 118 x^{8} - 158 x^{7} + 328 x^{6} - 344 x^{5} + 249 x^{4} - 129 x^{3} + 46 x^{2} - 10 x + 1$ $2^{16}\cdot 3^{10}\cdot 157^{5}$ $D_5\wr C_2$ (as 20T48) trivial $182.345344476$
20.0.379...597.1 $x^{20} - 5 x^{19} + 6 x^{18} + 14 x^{17} - 46 x^{16} + 25 x^{15} + 73 x^{14} - 122 x^{13} - 8 x^{12} + 193 x^{11} - 146 x^{10} - 144 x^{9} + 308 x^{8} - 127 x^{7} - 128 x^{6} + 161 x^{5} - 46 x^{4} - 26 x^{3} + 25 x^{2} - 8 x + 1$ $3^{15}\cdot 31^{9}$ $C_{10}\wr C_2$ (as 20T53) trivial $181.753135766$
20.0.405...161.1 $x^{20} - 6 x^{19} + 23 x^{18} - 66 x^{17} + 154 x^{16} - 304 x^{15} + 519 x^{14} - 778 x^{13} + 1036 x^{12} - 1233 x^{11} + 1317 x^{10} - 1265 x^{9} + 1093 x^{8} - 845 x^{7} + 580 x^{6} - 349 x^{5} + 180 x^{4} - 76 x^{3} + 25 x^{2} - 6 x + 1$ $7^{2}\cdot 53^{6}\cdot 139^{4}$ $C_2^{10}.S_5$ (as 20T799) trivial $62.9466310057$
20.0.540...000.1 $x^{20} - 3 x^{19} + 7 x^{18} - 5 x^{17} + 4 x^{16} + 11 x^{15} - 9 x^{14} + 21 x^{13} + 18 x^{12} - 9 x^{11} + 49 x^{10} - 9 x^{9} + 18 x^{8} + 21 x^{7} - 9 x^{6} + 11 x^{5} + 4 x^{4} - 5 x^{3} + 7 x^{2} - 3 x + 1$ $2^{16}\cdot 5^{10}\cdot 61^{5}$ $D_5\wr C_2$ (as 20T48) trivial $75.025557452$
20.0.569...801.1 $x^{20} - 4 x^{19} + 8 x^{18} - 12 x^{17} + 6 x^{16} + 11 x^{15} - 13 x^{14} - 4 x^{13} + 37 x^{12} - 63 x^{11} + 41 x^{10} + 4 x^{9} + 12 x^{8} - 58 x^{7} + 30 x^{6} + 7 x^{5} + 9 x^{4} - 12 x^{3} + 1$ $7^{10}\cdot 17^{10}$ $D_{10}$ (as 20T4) trivial $77.3255035829$
20.0.602...001.1 $x^{20} - 3 x^{19} + 4 x^{18} - 5 x^{17} + 9 x^{16} - 8 x^{15} + 9 x^{14} - 16 x^{13} + 11 x^{12} - 10 x^{11} + 17 x^{10} - 10 x^{9} + 11 x^{8} - 16 x^{7} + 9 x^{6} - 8 x^{5} + 9 x^{4} - 5 x^{3} + 4 x^{2} - 3 x + 1$ $47^{10}\cdot 107^{2}$ $C_2\wr D_5$ (as 20T81) trivial $79.7167288943$
20.0.682...416.1 $x^{20} - 2 x^{19} + x^{18} - 3 x^{17} + 6 x^{16} - x^{15} + 3 x^{14} - 11 x^{13} - x^{12} + 6 x^{11} + 7 x^{10} - 5 x^{9} + 9 x^{8} - 16 x^{7} - x^{6} + x^{5} + 8 x^{4} + 4 x^{3} + 7 x^{2} - 3 x + 1$ $2^{10}\cdot 7^{10}\cdot 11^{9}$ $C_{10}\wr C_2$ (as 20T53) trivial $87.3510823497$
20.0.684...976.1 $x^{20} - 2 x^{18} + x^{16} + 2 x^{14} - 4 x^{10} - x^{8} + 6 x^{6} - x^{4} - 2 x^{2} + 1$ $2^{30}\cdot 798143^{2}$ $C_2\times S_{10}$ (as 20T1021) trivial $171.360926564$
20.0.695...025.1 $x^{20} - 5 x^{19} + 12 x^{18} - 18 x^{17} + 20 x^{16} - 23 x^{15} + 33 x^{14} - 44 x^{13} + 47 x^{12} - 51 x^{11} + 78 x^{10} - 122 x^{9} + 143 x^{8} - 115 x^{7} + 61 x^{6} - 22 x^{5} + 10 x^{4} - 9 x^{3} + 6 x^{2} - 2 x + 1$ $5^{2}\cdot 23^{2}\cdot 47^{10}$ $C_2^9.D_{10}$ (as 20T412) trivial $86.800744447$
20.0.709...856.1 $x^{20} - 5 x^{19} + 15 x^{18} - 37 x^{17} + 78 x^{16} - 139 x^{15} + 219 x^{14} - 307 x^{13} + 386 x^{12} - 442 x^{11} + 463 x^{10} - 442 x^{9} + 386 x^{8} - 307 x^{7} + 219 x^{6} - 139 x^{5} + 78 x^{4} - 37 x^{3} + 15 x^{2} - 5 x + 1$ $2^{4}\cdot 83^{4}\cdot 983^{4}$ $C_3^5.D_6$ (as 20T669) trivial $103.364702597$
20.0.715...000.1 $x^{20} + 2 x^{18} + 2 x^{16} + 4 x^{14} + 11 x^{12} + 14 x^{10} + 11 x^{8} + 6 x^{6} + 5 x^{4} + 4 x^{2} + 1$ $2^{10}\cdot 5^{4}\cdot 5783^{4}$ $C_2^9.C_2^4:S_5$ (as 20T964) trivial $87.5155752534$
20.0.750...776.1 $x^{20} + x^{16} + 5 x^{12} + 10 x^{10} + 9 x^{8} + 7 x^{6} + 3 x^{4} + 4 x^{2} + 1$ $2^{8}\cdot 41381^{4}$ $C_2\times C_4^4:S_5$ (as 20T673) trivial $91.2702526158$
20.0.781...000.1 $x^{20} - 5 x^{19} + 5 x^{18} + 15 x^{17} - 30 x^{16} - 21 x^{15} + 75 x^{14} + 15 x^{13} - 120 x^{12} - 5 x^{11} + 141 x^{10} - 5 x^{9} - 120 x^{8} + 15 x^{7} + 75 x^{6} - 21 x^{5} - 30 x^{4} + 15 x^{3} + 5 x^{2} - 5 x + 1$ $2^{16}\cdot 5^{23}$ $F_5$ (as 20T5) trivial $525.931286845$
20.0.902...129.1 $x^{20} + x^{18} - 6 x^{17} - x^{16} - 4 x^{15} + 15 x^{14} + 7 x^{13} + 10 x^{12} - 17 x^{11} - 11 x^{10} - 17 x^{9} + 10 x^{8} + 7 x^{7} + 15 x^{6} - 4 x^{5} - x^{4} - 6 x^{3} + x^{2} + 1$ $3^{10}\cdot 11119^{4}$ $C_2\wr S_5$ (as 20T279) trivial $293.866842819$
20.0.908...736.1 $x^{20} + 7 x^{18} + 22 x^{16} + 42 x^{14} + 59 x^{12} + 65 x^{10} + 55 x^{8} + 36 x^{6} + 17 x^{4} + 6 x^{2} + 1$ $2^{10}\cdot 47^{8}\cdot 193^{2}$ $C_2^6.C_2^8:D_5$ (as 20T853) trivial $99.8204300191$
20.0.921...449.1 $x^{20} - 2 x^{19} - x^{18} + 5 x^{17} - 2 x^{16} - 3 x^{15} + 7 x^{14} - 24 x^{13} + 51 x^{12} - 67 x^{11} + 79 x^{10} - 95 x^{9} + 96 x^{8} - 81 x^{7} + 68 x^{6} - 53 x^{5} + 34 x^{4} - 20 x^{3} + 11 x^{2} - 4 x + 1$ $79\cdot 151\cdot 278005859^{2}$ $C_2^{10}.S_{10}$ (as 20T1110) trivial $104.951823132$
20.0.960...576.1 $x^{20} + 2 x^{18} + x^{14} + 7 x^{12} - 6 x^{10} + 7 x^{8} + x^{6} + 2 x^{2} + 1$ $2^{20}\cdot 5501^{4}$ $C_3^5.D_6$ (as 20T669) trivial $103.153871476$
20.0.108...241.1 $x^{20} - 4 x^{19} + 10 x^{18} - 17 x^{17} + 26 x^{16} - 29 x^{15} + 24 x^{14} - 5 x^{13} - 7 x^{12} + 20 x^{11} - 14 x^{10} + 8 x^{9} + 12 x^{8} + x^{7} - 6 x^{6} + 9 x^{5} + 9 x^{4} - 2 x^{3} - x^{2} + x + 1$ $37^{4}\cdot 4903^{4}$ $C_3^5.D_6$ (as 20T669) trivial $109.689161601$
20.0.124...125.1 $x^{20} - x^{19} + x^{18} - 2 x^{17} + 2 x^{16} - 5 x^{15} + 5 x^{14} - 4 x^{13} + 5 x^{12} - 3 x^{11} + 12 x^{10} - 8 x^{9} + 2 x^{8} - 6 x^{7} - x^{6} - 10 x^{5} + 6 x^{4} + 3 x^{3} + 2 x^{2} + x + 1$ $3^{4}\cdot 5^{17}\cdot 67^{4}$ $C_4\times S_5$ (as 20T123) trivial $676.304774$
20.0.126...424.1 $x^{20} + 5 x^{18} + 14 x^{16} + 27 x^{14} + 41 x^{12} + 53 x^{10} + 55 x^{8} + 43 x^{6} + 22 x^{4} + 7 x^{2} + 1$ $2^{10}\cdot 3^{4}\cdot 11119^{4}$ $C_2^9.C_2^4:S_5$ (as 20T964) trivial $117.777592282$
20.0.143...464.1 $x^{20} - 5 x^{19} + 11 x^{18} - 11 x^{17} - x^{16} + 16 x^{15} - 20 x^{14} + 11 x^{13} + 5 x^{12} - 20 x^{11} + 27 x^{10} - 2 x^{9} - 22 x^{8} + 40 x^{7} - 9 x^{6} - 5 x^{5} + 17 x^{4} - 7 x^{3} + 5 x^{2} - 3 x + 1$ $2^{10}\cdot 31^{3}\cdot 2617^{4}$ $C_2^{10}.C_2\wr S_5$ (as 20T1015) trivial $130.791344738$
20.0.159...669.1 $x^{20} - 6 x^{19} + 11 x^{18} - 13 x^{16} - 19 x^{15} + 50 x^{14} + 8 x^{13} - 42 x^{12} - 38 x^{11} + 42 x^{10} + 31 x^{9} + 17 x^{8} - 59 x^{7} + 6 x^{6} + 2 x^{5} - x^{4} + 15 x^{3} - 2 x^{2} - 3 x + 1$ $3^{10}\cdot 1609^{4}\cdot 4021$ $C_2^8.(D_4\times S_5)$ (as 20T887) trivial $427.42684139$
20.0.160...377.1 $x^{20} - x^{19} + 5 x^{18} - 3 x^{17} + 9 x^{16} - x^{15} + 7 x^{14} + 4 x^{13} + 4 x^{12} + 5 x^{11} + 4 x^{10} + 3 x^{9} + 6 x^{8} + 5 x^{6} + 2 x^{5} - x^{4} + 3 x^{3} + 1$ $28753\cdot 236438047^{2}$ $C_2^{10}.S_{10}$ (as 20T1110) trivial $140.247818215$
20.0.161...304.1 $x^{20} + 4 x^{16} - 4 x^{12} + 4 x^{8} - 8 x^{4} + 4$ $2^{38}\cdot 277^{4}$ $C_2\wr S_5$ (as 20T279) trivial $476.032179845$
20.0.172...632.1 $x^{20} - x^{19} + x^{18} - 4 x^{17} - 3 x^{16} + 15 x^{15} + 3 x^{14} - 28 x^{13} + 2 x^{12} + 19 x^{11} + 29 x^{10} - 56 x^{9} + 17 x^{8} - 3 x^{7} + 26 x^{6} - 34 x^{5} + 37 x^{4} - 35 x^{3} + 21 x^{2} - 7 x + 1$ $2^{15}\cdot 47^{10}$ $C_5:D_4$ (as 20T11) trivial $143.606119616$
20.2.181...944.1 $x^{20} - 6 x^{16} + 11 x^{12} + 3 x^{10} - 17 x^{8} + 6 x^{6} + 2 x^{2} - 1$ $-\,2^{10}\cdot 36497^{4}$ $C_2^9.C_2^5.S_5$ (as 20T992) trivial $201.865023128$
20.0.208...625.1 $x^{20} - 4 x^{19} + 9 x^{18} - 14 x^{17} + 19 x^{16} - 29 x^{15} + 45 x^{14} - 60 x^{13} + 64 x^{12} - 62 x^{11} + 65 x^{10} - 52 x^{9} + 42 x^{8} - 47 x^{7} + 35 x^{6} - 24 x^{5} + 22 x^{4} - 11 x^{3} + 4 x^{2} - 3 x + 1$ $3^{10}\cdot 5^{8}\cdot 67^{6}$ $C_2\wr S_5$ (as 20T288) trivial $527.926443922$
20.0.219...184.1 $x^{20} - 5 x^{19} + 11 x^{18} - 11 x^{17} - 2 x^{16} + 16 x^{15} - 2 x^{14} - 24 x^{13} + 22 x^{12} + 8 x^{11} - 22 x^{10} - 13 x^{9} + 14 x^{8} + 3 x^{7} + x^{6} + 15 x^{5} + 20 x^{4} + 9 x^{3} + 3 x^{2} + 2 x + 1$ $2^{10}\cdot 7^{6}\cdot 23^{2}\cdot 431^{4}$ $C_2^9.C_2^5.S_5$ (as 20T994) trivial $166.624941197$
20.2.226...904.1 $x^{20} + x^{18} - 4 x^{16} - 7 x^{14} - x^{12} + 21 x^{10} + 3 x^{8} - 13 x^{6} - 4 x^{4} + 3 x^{2} - 1$ $-\,2^{10}\cdot 38569^{4}$ $C_2^9.C_2^5.S_5$ (as 20T992) trivial $228.08067214$
20.0.228...304.1 $x^{20} + 2 x^{18} - 3 x^{16} - 9 x^{14} - 2 x^{12} + 13 x^{10} + 16 x^{8} + x^{6} - 7 x^{4} + 1$ $2^{10}\cdot 7^{4}\cdot 5519^{4}$ $C_2^9.C_2^4:S_5$ (as 20T964) trivial $175.20160463169768$
20.0.238...224.1 $x^{20} + 5 x^{18} + 12 x^{16} + 19 x^{14} + 28 x^{12} + 50 x^{10} + 70 x^{8} + 62 x^{6} + 32 x^{4} + 9 x^{2} + 1$ $2^{10}\cdot 17^{4}\cdot 2297^{4}$ $C_2^9.C_2^4:S_5$ (as 20T964) trivial $176.861949817$
20.0.239...125.1 $x^{20} - 3 x^{19} + 9 x^{18} - 18 x^{17} + 34 x^{16} - 53 x^{15} + 77 x^{14} - 97 x^{13} + 114 x^{12} - 121 x^{11} + 116 x^{10} - 104 x^{9} + 79 x^{8} - 56 x^{7} + 33 x^{6} - 19 x^{5} + 12 x^{4} - 7 x^{3} + 5 x^{2} - 2 x + 1$ $5^{15}\cdot 280001^{2}$ $S_5^2:C_4$ (as 20T654) trivial $858.376938924$
20.0.246...125.1 $x^{20} - x^{19} - x^{16} - 2 x^{15} + 4 x^{14} - x^{13} + x^{12} + x^{11} + 4 x^{10} - 8 x^{9} + 2 x^{8} - x^{7} - 2 x^{6} - x^{5} + 8 x^{4} - 5 x^{3} + 3 x^{2} - 2 x + 1$ $5^{15}\cdot 13^{4}\cdot 41^{4}$ $C_4\times S_5$ (as 20T123) trivial $887.733037213$
20.0.250...000.1 $x^{20} - 4 x^{19} + 7 x^{18} - 6 x^{17} - 2 x^{16} + 6 x^{15} + 14 x^{14} - 54 x^{13} + 64 x^{12} + 24 x^{11} - 190 x^{10} + 290 x^{9} - 169 x^{8} - 154 x^{7} + 464 x^{6} - 554 x^{5} + 417 x^{4} - 208 x^{3} + 66 x^{2} - 12 x + 1$ $2^{20}\cdot 5^{22}$ $C_5\times D_{10}$ (as 20T24) trivial $397.737246993$
20.0.253...272.1 $x^{20} - x^{19} - 3 x^{18} + 7 x^{17} + 2 x^{16} - 17 x^{15} + 19 x^{14} - 17 x^{12} + 9 x^{11} + 34 x^{10} - 34 x^{9} - x^{8} + 32 x^{7} - 4 x^{6} + 4 x^{5} + 3 x^{3} - 3 x + 1$ $2^{10}\cdot 47^{11}$ $C_2^9.D_{10}$ (as 20T423) trivial $179.782999261$
20.0.261...125.1 $x^{20} - 3 x^{19} + 9 x^{18} - 18 x^{17} + 33 x^{16} - 50 x^{15} + 73 x^{14} - 93 x^{13} + 118 x^{12} - 128 x^{11} + 135 x^{10} - 112 x^{9} + 88 x^{8} - 48 x^{7} + 27 x^{6} - 10 x^{5} + 10 x^{4} - 6 x^{3} + 6 x^{2} - 2 x + 1$ $5^{15}\cdot 199^{2}\cdot 1471^{2}$ $S_5^2:C_4$ (as 20T654) trivial $906.492535524$
20.0.278...609.1 $x^{20} - 2 x^{19} + 3 x^{18} - 12 x^{17} + 27 x^{16} - 39 x^{15} + 68 x^{14} - 127 x^{13} + 178 x^{12} - 215 x^{11} + 277 x^{10} - 328 x^{9} + 297 x^{8} - 211 x^{7} + 139 x^{6} - 82 x^{5} + 29 x^{4} + x^{3} - 3 x^{2} - x + 1$ $7^{2}\cdot 53^{4}\cdot 139^{6}$ $C_2^{10}.S_5$ (as 20T799) trivial $192.366272752$
20.0.282...373.1 $x^{20} - 7 x^{19} + 24 x^{18} - 52 x^{17} + 75 x^{16} - 58 x^{15} - 28 x^{14} + 140 x^{13} - 109 x^{12} - 274 x^{11} + 1033 x^{10} - 1874 x^{9} + 2367 x^{8} - 2282 x^{7} + 1739 x^{6} - 1057 x^{5} + 509 x^{4} - 190 x^{3} + 53 x^{2} - 10 x + 1$ $3^{10}\cdot 37^{5}\cdot 109^{2}\cdot 241^{2}$ $S_5^2:D_4$ (as 20T781) trivial $567.746569822$
20.0.290...573.1 $x^{20} - 3 x^{19} + 3 x^{18} - 3 x^{17} + 8 x^{16} - 13 x^{15} + 16 x^{14} - 18 x^{13} + 22 x^{12} - 30 x^{11} + 32 x^{10} - 25 x^{9} + 18 x^{8} - 17 x^{7} + 25 x^{6} - 31 x^{5} + 29 x^{4} - 21 x^{3} + 11 x^{2} - 4 x + 1$ $67\cdot 83^{2}\cdot 631\cdot 1777^{4}$ $C_2^{10}.C_2\wr S_5$ (as 20T1015) trivial $194.247728439$
20.0.294...449.1 $x^{20} - 6 x^{19} + 24 x^{18} - 72 x^{17} + 177 x^{16} - 363 x^{15} + 637 x^{14} - 973 x^{13} + 1307 x^{12} - 1556 x^{11} + 1649 x^{10} - 1556 x^{9} + 1307 x^{8} - 973 x^{7} + 637 x^{6} - 363 x^{5} + 177 x^{4} - 72 x^{3} + 24 x^{2} - 6 x + 1$ $11^{18}\cdot 23^{2}$ $C_2^5:C_{10}$ (as 20T86) trivial $2189.13991382$
20.2.294...176.1 $x^{20} + 3 x^{18} + 4 x^{16} + x^{14} - 3 x^{12} - 6 x^{10} - 9 x^{8} - 13 x^{6} - 12 x^{4} - 6 x^{2} - 1$ $-\,2^{12}\cdot 41^{2}\cdot 4549^{4}$ $C_2^{10}.C_2\wr S_5$ (as 20T1015) trivial $265.437747416$
20.0.294...176.1 $x^{20} + 6 x^{18} + 18 x^{16} + 39 x^{14} + 65 x^{12} + 73 x^{10} + 45 x^{8} + 4 x^{6} - 11 x^{4} - 2 x^{2} + 1$ $2^{12}\cdot 41^{2}\cdot 4549^{4}$ $C_2^{10}.S_5$ (as 20T799) trivial $198.57668435$
20.0.302...896.1 $x^{20} + x^{18} - 4 x^{17} + 2 x^{16} - 4 x^{15} + 7 x^{14} - 6 x^{13} + 8 x^{12} - 6 x^{11} + 7 x^{10} - 6 x^{9} + 4 x^{8} - 2 x^{7} - 2 x^{5} - x^{4} + x^{2} + 1$ $2^{20}\cdot 3^{10}\cdot 220873^{2}$ $S_5^2:C_2^2$ (as 20T656) trivial $1171.34610492$
20.0.310...401.1 $x^{20} - x^{19} - 5 x^{18} + 22 x^{16} + x^{15} - 38 x^{14} - 11 x^{13} + 46 x^{12} + 11 x^{11} - 51 x^{10} + 11 x^{9} + 46 x^{8} - 11 x^{7} - 38 x^{6} + x^{5} + 22 x^{4} - 5 x^{2} - x + 1$ $3^{10}\cdot 47^{10}$ $D_{10}$ (as 20T4) trivial $630.365304677$
20.0.330...241.1 $x^{20} - 2 x^{19} + 3 x^{18} - 6 x^{17} + 8 x^{16} - 9 x^{15} + 11 x^{14} - 10 x^{13} + 6 x^{12} - 5 x^{11} + x^{10} + 4 x^{9} - 4 x^{8} + 5 x^{7} - 5 x^{6} + 3 x^{5} - x^{4} + x^{2} - x + 1$ $3^{10}\cdot 236438047^{2}$ $C_2\times S_{10}$ (as 20T1021) trivial $622.109043514$
20.0.335...752.1 $x^{20} - 2 x^{19} + 10 x^{17} - 15 x^{16} + 40 x^{14} - 64 x^{13} + 46 x^{12} + 8 x^{11} - 32 x^{10} + 8 x^{9} + 46 x^{8} - 64 x^{7} + 40 x^{6} - 15 x^{4} + 10 x^{3} - 2 x + 1$ $2^{16}\cdot 13^{15}$ $F_5$ (as 20T5) trivial $238.906276128$
20.0.340...929.1 $x^{20} - 2 x^{19} + 2 x^{18} - 4 x^{17} + 6 x^{16} - 4 x^{15} + 4 x^{14} - 7 x^{13} + 5 x^{12} - 6 x^{11} + 13 x^{10} - 14 x^{9} + 16 x^{8} - 22 x^{7} + 21 x^{6} - 17 x^{5} + 16 x^{4} - 11 x^{3} + 6 x^{2} - 3 x + 1$ $3^{10}\cdot 467^{2}\cdot 514417^{2}$ $C_2\times S_{10}$ (as 20T1021) trivial $658.849285992$
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