Starting with polynomial:
P : 32768*t^15 - 1720320*t^13 + 33546240*t^11 - 307507200*t^9 + 1383782400*t^7 - 2905943040*t^5 + 2421619200*t^3 - 518918400*t
Extension levels are: 15 24
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Trying to find an order 24 Kronrod extension for:
P1 : 32768*t^15 - 1720320*t^13 + 33546240*t^11 - 307507200*t^9 + 1383782400*t^7 - 2905943040*t^5 + 2421619200*t^3 - 518918400*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : 32768*t^39 - 1016040660713472/111167107*t^37 + 630994126762647552/555835535*t^35 - 9248460482805469184/111167107*t^33 + 446768535407265189888/111167107*t^31 - 15057384665567210588160/111167107*t^29 + 365597199828670472678400/111167107*t^27 - 6512733849164472302833152/111167107*t^25 + 85906739484016391551564800/111167107*t^23 - 841118118270995438100057600/111167107*t^21 + 6092731380313010017059552000/111167107*t^19 - 32361114819521421274283712000/111167107*t^17 + 124156291652178734669144886000/111167107*t^15 - 336436589296583027941144995000/111167107*t^13 + 623434871234905196629795132500/111167107*t^11 - 754023031254233747019995231250/111167107*t^9 + 1111063705148282649675579793125/222334214*t^7 - 895841061297567707935216729125/444668428*t^5 + 329101417712933649800160519375/889336856*t^3 - 36802618766800322253517074375/1778673712*t
-------------------------------------------------
Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
 current precision for weights: 53
Linear system for weights solvable: 0
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 106
Linear system for weights solvable: 0
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
  current precision for roots: 424
  current precision for roots: 848
 current precision for weights: 424
Linear system for weights solvable: 1
Sufficient bits for target precision reached
-------------------------------------------------
The nodes are:
| (5.436781500778247337 - 3.5924096896236988146e-974j)  +/-  (8.26e-247, 8.26e-247j)
| (7.2504377044610822138 - 9.9052271226825307205e-981j)  +/-  (9.92e-249, 9.92e-249j)
| (6.5458809706060193907 - 1.4303151392864318433e-977j)  +/-  (8.55e-248, 8.55e-248j)
| (-7.2504377044610822138 - 1.7025504261736838499e-985j)  +/-  (8.91e-249, 8.91e-249j)
| (-6.5458809706060193907 + 8.6103622774385450849e-984j)  +/-  (8.87e-248, 8.87e-248j)
| (-4.9533567199767733726 + 2.0770789001994310228e-982j)  +/-  (1.5e-246, 1.5e-246j)
| (-5.436781500778247337 - 2.6792069135786233399e-983j)  +/-  (7.77e-247, 7.77e-247j)
| (-1.7199925751864889324 + 1.4695134822453730051e-988j)  +/-  (5.42e-249, 5.42e-249j)
| (5.9604817476738623639 - 4.6461914095297113519e-983j)  +/-  (3.35e-247, 3.35e-247j)
| (4.0721120555755271129 - 4.1281647009312663997e-994j)  +/-  (1.93e-246, 1.93e-246j)
| (-5.9604817476738623639 + 7.7803758776349636837e-1005j)  +/-  (3.5e-247, 3.5e-247j)
| (-3.6699503734044525347 + 1.8058103547512442486e-1003j)  +/-  (1.41e-246, 1.41e-246j)
| (-3.2996819631787718239 - 2.6704509600687746257e-1010j)  +/-  (9.37e-247, 9.37e-247j)
| (-1.444517916412991553 - 2.9589543185969947586e-1023j)  +/-  (8.95e-250, 8.95e-250j)
| (3.6699503734044525347 - 2.4900423917467401894e-1027j)  +/-  (1.39e-246, 1.39e-246j)
| (1.7199925751864889324 - 7.9533767093793140351e-1044j)  +/-  (4.29e-249, 4.29e-249j)
| (4.9533567199767733726 + 6.2690616674410878016e-1052j)  +/-  (1.55e-246, 1.55e-246j)
| (-2.0050300011469744302 - 1.1022633833307955477e-1066j)  +/-  (1.98e-248, 1.98e-248j)
| (-1.1361155852109206663 - 1.4253249009143388612e-1069j)  +/-  (9.46e-251, 9.46e-251j)
| (-2.9671669279056032485 - 3.0847235935893569625e-1065j)  +/-  (5.47e-247, 5.47e-247j)
| (0.82652848399839320209 + 2.7796738480042267338e-1070j)  +/-  (1.04e-251, 1.04e-251j)
| (2.6513901390187629903 + 8.1327164029201515543e-1069j)  +/-  (2.18e-247, 2.18e-247j)
| (4.4999907073093915537 - 1.7255186704140950822e-1081j)  +/-  (1.59e-246, 1.59e-246j)
| (-4.0721120555755271129 - 1.2513882559728663263e-1088j)  +/-  (1.62e-246, 1.62e-246j)
| (-0.82652848399839320209 - 2.5886421074403019583e-1096j)  +/-  (9.34e-252, 9.34e-252j)
| (-4.4999907073093915537 + 6.6869136822535382886e-1092j)  +/-  (1.84e-246, 1.84e-246j)
| (1.444517916412991553 - 3.4761480772713557695e-1094j)  +/-  (7.85e-250, 7.85e-250j)
| (-1.5859004740931267275e-1112 - 2.3297488241752480411e-1113j)  +/-  (6.25e-1111, 6.25e-1111j)
| (-0.30734024544739846102 + 1.0640946710352198039e-1098j)  +/-  (8.79e-254, 8.79e-254j)
| (-0.56506958325557574853 + 4.0574199938333460948e-1097j)  +/-  (1.19e-252, 1.19e-252j)
| (0.56506958325557574853 - 2.7885665699800734063e-1097j)  +/-  (1.27e-252, 1.27e-252j)
| (1.1361155852109206663 - 9.3324140864684390755e-1096j)  +/-  (9.5e-251, 9.5e-251j)
| (2.3257324861738577455 + 7.7376650313216304618e-1091j)  +/-  (7.55e-248, 7.55e-248j)
| (3.2996819631787718239 - 1.6031918239077773097e-1091j)  +/-  (9.08e-247, 9.08e-247j)
| (-2.6513901390187629903 - 7.6611578383793819299e-1095j)  +/-  (2.19e-247, 2.19e-247j)
| (-2.3257324861738577455 + 2.646865817488803205e-1097j)  +/-  (7.08e-248, 7.08e-248j)
| (2.0050300011469744302 - 6.2756443319968324394e-1100j)  +/-  (2.17e-248, 2.17e-248j)
| (0.30734024544739846102 - 3.810870743673153412e-1106j)  +/-  (8.79e-254, 8.79e-254j)
| (2.9671669279056032485 - 4.0710667712833365756e-1103j)  +/-  (5.52e-247, 5.52e-247j)
-------------------------------------------------
The weights are:
| (4.1146548220033784888e-14 + 1.0024550471864968417e-986j)  +/-  (8.71e-89, 4.48e-212j)
| (6.772757518504562879e-24 + 1.3381288394556539455e-993j)  +/-  (6.42e-94, 3.3e-217j)
| (8.7382257498122797709e-20 - 5.1122903926947365533e-991j)  +/-  (4.38e-92, 2.25e-215j)
| (6.772757518504562879e-24 - 1.9128677786869082903e-994j)  +/-  (2.43e-96, 1.25e-219j)
| (8.7382257498122797709e-20 + 4.7319677701515454311e-992j)  +/-  (7.67e-95, 3.95e-218j)
| (5.824106452341604572e-12 - 3.3706531790149673297e-987j)  +/-  (1.59e-91, 8.17e-215j)
| (4.1146548220033784888e-14 + 1.3594040964942720897e-988j)  +/-  (9.12e-93, 4.69e-216j)
| (0.0078542723602113975499 + 9.0478983455736278343e-980j)  +/-  (7.53e-79, 3.88e-202j)
| (1.1535392303784960449e-16 + 7.6758199252385224954e-989j)  +/-  (1.4e-94, 7.22e-218j)
| (1.4739810500681308385e-08 - 5.8996214953438527127e-984j)  +/-  (9.83e-91, 5.06e-214j)
| (1.1535392303784960449e-16 - 3.527027788448462447e-990j)  +/-  (2.62e-94, 1.35e-217j)
| (3.0951755662423516609e-07 + 9.5351402994964972427e-984j)  +/-  (1.31e-89, 6.75e-213j)
| (3.7013673939722585426e-06 - 8.3443506290157870334e-983j)  +/-  (1.32e-88, 6.81e-212j)
| (0.020476813532727168127 - 1.8327217482876433295e-979j)  +/-  (6.38e-81, 3.28e-204j)
| (3.0951755662423516609e-07 + 4.9146708309250606662e-983j)  +/-  (4.38e-91, 2.25e-214j)
| (0.0078542723602113975499 + 1.7421961735616913249e-979j)  +/-  (2.17e-84, 1.12e-207j)
| (5.824106452341604572e-12 - 7.2444751014722682506e-986j)  +/-  (3.67e-94, 1.89e-217j)
| (0.0031033518259268710789 - 3.2194650360998788075e-980j)  +/-  (5.02e-85, 2.58e-208j)
| (0.049267535980929746331 + 3.4411089125396158216e-979j)  +/-  (2.04e-81, 1.05e-204j)
| (2.6903913671232732736e-05 + 5.0723303263523998366e-982j)  +/-  (1.11e-88, 5.72e-212j)
| (0.083116269952533007186 - 9.5007579321344073451e-979j)  +/-  (4.48e-82, 2.31e-205j)
| (0.00015960337732276406239 - 6.4779981487023886904e-981j)  +/-  (6.25e-90, 3.21e-213j)
| (3.987385075332939411e-10 + 6.4216933416315526838e-985j)  +/-  (2e-93, 1.03e-216j)
| (1.4739810500681308385e-08 - 8.4668486906717329608e-985j)  +/-  (2.52e-92, 1.3e-215j)
| (0.083116269952533007186 - 6.9932513500450091303e-979j)  +/-  (2.26e-84, 1.16e-207j)
| (3.987385075332939411e-10 + 6.0540629801034244706e-986j)  +/-  (1.65e-93, 8.5e-217j)
| (0.020476813532727168127 - 3.1589861840139421442e-979j)  +/-  (3.84e-87, 1.98e-210j)
| (0.17890255028744260682 + 1.2549058034630563529e-978j)  +/-  (8.92e-85, 4.59e-208j)
| (0.14747839261418247087 - 1.2697348225607163962e-978j)  +/-  (7.19e-85, 3.7e-208j)
| (0.098231944955020205513 + 1.1330692964264104469e-978j)  +/-  (6.06e-85, 3.12e-208j)
| (0.098231944955020205513 + 1.3959185137379459814e-978j)  +/-  (9.02e-86, 4.64e-209j)
| (0.049267535980929746331 + 5.259197755069376412e-979j)  +/-  (2.84e-87, 1.46e-210j)
| (0.00082961031438885998609 + 2.1725380294195397572e-980j)  +/-  (1.54e-91, 7.9e-215j)
| (3.7013673939722585426e-06 - 3.4111696334762860247e-982j)  +/-  (6.99e-94, 3.6e-217j)
| (0.00015960337732276406239 - 2.2308830008045471722e-981j)  +/-  (6.45e-92, 3.34e-215j)
| (0.00082961031438885998609 + 8.7070680441024623261e-981j)  +/-  (2.82e-91, 1.46e-214j)
| (0.0031033518259268710789 - 6.9814634310727923156e-980j)  +/-  (8.9e-92, 4.66e-215j)
| (0.14747839261418247087 - 1.4218919476529726235e-978j)  +/-  (5.05e-90, 3.11e-213j)
| (2.6903913671232732736e-05 + 1.7260827114467360101e-981j)  +/-  (1.06e-93, 5.36e-217j)
