Starting with polynomial:
P : 2*t
Extension levels are: 1 4 14
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Trying to find an order 4 Kronrod extension for:
P1 : 2*t
Solvable: 1
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Trying to find an order 14 Kronrod extension for:
P2 : 2*t^5 - 10*t^3 + 15/2*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : 2*t^19 - 10067/33*t^17 + 2327243/165*t^15 - 6549361/22*t^13 + 6515327/2*t^11 - 19095440*t^9 + 935949105/16*t^7 - 2754381357/32*t^5 + 6473363715/128*t^3 - 1927283085/256*t
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Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
 current precision for weights: 53
Linear system for weights solvable: 1
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 106
Linear system for weights solvable: 1
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
Sufficient bits for target precision reached
-------------------------------------------------
The nodes are:
| (2.594640160845429473 - 1.5183613328849527767e-467j)  +/-  (8.03e-124, 8.03e-124j)
| (-9.5373016113985254056 - 2.765109244823377267e-471j)  +/-  (4.17e-125, 4.17e-125j)
| (4.6929196191131403725 - 6.6768332227839942951e-469j)  +/-  (7.26e-124, 7.26e-124j)
| (-4.6929196191131403725 - 2.9196278359471727079e-473j)  +/-  (6.94e-124, 6.94e-124j)
| (9.5373016113985254056 - 7.0284079175272085842e-482j)  +/-  (4.17e-125, 4.17e-125j)
| (3.8879058412990795166 + 6.9405528185581184769e-482j)  +/-  (1.48e-123, 1.48e-123j)
| (-3.2095060327776332981 + 6.6439006815572424912e-491j)  +/-  (1.52e-123, 1.52e-123j)
| (-0.95857246461381850711 + 1.6386510622642556119e-498j)  +/-  (1.25e-125, 1.25e-125j)
| (3.2095060327776332981 - 1.0456154397305250095e-497j)  +/-  (1.22e-123, 1.22e-123j)
| (-0.46844531406652970763 + 2.8652008901197921786e-500j)  +/-  (1.15e-126, 1.15e-126j)
| (0.95857246461381850711 - 2.9566434717193600141e-500j)  +/-  (1.17e-125, 1.17e-125j)
| (-3.8879058412990795166 + 7.803100296496455295e-500j)  +/-  (1.54e-123, 1.54e-123j)
| (-1.4759224472426343846 - 6.5248092078858299281e-502j)  +/-  (5.9e-125, 5.9e-125j)
| (-2.0201828704560856329 + 8.6936760119062071102e-511j)  +/-  (3.53e-124, 3.53e-124j)
| (2.0201828704560856329 - 2.161300954688971235e-518j)  +/-  (2.91e-124, 2.91e-124j)
| (0.46844531406652970763 + 3.8404711034258466075e-522j)  +/-  (1.54e-126, 1.54e-126j)
| (1.4759224472426343846 + 6.8160293869204941471e-521j)  +/-  (5.69e-125, 5.69e-125j)
| (-2.594640160845429473 + 5.0250625739015633326e-532j)  +/-  (7.88e-124, 7.88e-124j)
| (5.6623964734668661995e-595 + 3.0595206751796777046e-595j)  +/-  (1.22e-593, 1.22e-593j)
-------------------------------------------------
The weights are:
| (0.0003982573513460454822 + 1.7478998599148733359e-470j)  +/-  (3.84e-47, 2.68e-109j)
| (2.2873946920406558184e-23 + 2.9024028428335790537e-481j)  +/-  (7.79e-58, 5.44e-120j)
| (1.4162985704967727899e-10 + 1.1098114534634492557e-474j)  +/-  (3.07e-52, 2.14e-114j)
| (1.4162985704967727899e-10 - 3.1940229635997423214e-475j)  +/-  (4.91e-53, 3.43e-115j)
| (2.2873946920406558184e-23 - 5.0716792285491485157e-481j)  +/-  (2.81e-58, 1.97e-120j)
| (1.1136705169240414073e-07 - 5.7447337131503320331e-473j)  +/-  (3.93e-51, 2.75e-113j)
| (1.2153406331238233849e-05 - 1.5446060523865714191e-472j)  +/-  (1.61e-51, 1.13e-113j)
| (0.11340269242008818786 - 5.3576005283152916847e-470j)  +/-  (2.34e-46, 1.63e-108j)
| (1.2153406331238233849e-05 + 1.4581290262142277505e-471j)  +/-  (2.76e-50, 1.92e-112j)
| (0.2161292515935058234 + 1.0418266708761962208e-469j)  +/-  (1.86e-46, 1.29e-108j)
| (0.11340269242008818786 - 1.1635729544340487615e-469j)  +/-  (4.75e-47, 3.31e-109j)
| (1.1136705169240414073e-07 + 1.1459624368936158024e-473j)  +/-  (1.49e-52, 1.04e-114j)
| (0.033902787518690986592 + 2.0428276797858723496e-470j)  +/-  (3.83e-49, 2.65e-111j)
| (0.0053198387803739524466 - 5.7764254549215344412e-471j)  +/-  (2.52e-50, 1.73e-112j)
| (0.0053198387803739524466 - 4.6405004000250446099e-470j)  +/-  (1.25e-50, 8.32e-113j)
| (0.2161292515935058234 + 1.5009046959359293528e-469j)  +/-  (1.46e-49, 9.33e-112j)
| (0.033902787518690986592 + 7.4331203374110933319e-470j)  +/-  (3.8e-50, 2.55e-112j)
| (0.0003982573513460454822 + 1.1652503533227146912e-471j)  +/-  (8.5e-52, 6.43e-114j)
| (0.26166981484196443306 - 1.4682060674107706796e-469j)  +/-  (1.13e-49, 6.5e-112j)
