Starting with polynomial:
P : t
Extension levels are: 1 4 14
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Trying to find an order 4 Kronrod extension for:
P1 : t
Solvable: 1
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Trying to find an order 14 Kronrod extension for:
P2 : t^5 - 10*t^3 + 15*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : t^19 - 10067/33*t^17 + 4654486/165*t^15 - 13098722/11*t^13 + 26061308*t^11 - 305527040*t^9 + 1871898210*t^7 - 5508762714*t^5 + 6473363715*t^3 - 1927283085*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
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The nodes are:
| (-2.8569700138728056542 + 1.1573904270989941139e-375j)  +/-  (4.01e-124, 4.01e-124j)
| (5.4983291699947363701 + 2.7286880303235632492e-382j)  +/-  (1.96e-123, 1.96e-123j)
| (-3.6693753049455151439 + 3.6750815901364892352e-384j)  +/-  (9.49e-124, 9.49e-124j)
| (4.5389269600723963503 - 6.5240251433358294306e-389j)  +/-  (2e-123, 2e-123j)
| (2.8569700138728056542 - 2.3182280354830966937e-389j)  +/-  (3.86e-124, 3.86e-124j)
| (13.487781287282568426 + 1.6407419272873201649e-390j)  +/-  (5.54e-125, 5.54e-125j)
| (-6.6367905724765826016 - 7.9167945559580851517e-388j)  +/-  (7.55e-124, 7.55e-124j)
| (-4.5389269600723963503 + 8.7907115475952406741e-391j)  +/-  (1.78e-123, 1.78e-123j)
| (3.6693753049455151439 - 5.4248461682915458659e-394j)  +/-  (1.07e-123, 1.07e-123j)
| (6.6367905724765826016 + 3.3555749494586881645e-395j)  +/-  (7.62e-124, 7.62e-124j)
| (1.7476952861764000857e-396 + 1.0486171717058400514e-396j)  +/-  (3.87e-395, 3.87e-395j)
| (-5.4983291699947363701 + 5.8028945048825784095e-399j)  +/-  (2.15e-123, 2.15e-123j)
| (0.66248171638301031012 - 3.4001334989546357868e-401j)  +/-  (2.5e-126, 2.5e-126j)
| (-2.0872695419014224088 - 1.2207510551738553348e-405j)  +/-  (7.19e-125, 7.19e-125j)
| (-13.487781287282568426 + 5.0933703101974650283e-413j)  +/-  (5.54e-125, 5.54e-125j)
| (2.0872695419014224088 + 6.6941438362595254658e-412j)  +/-  (7.66e-125, 7.66e-125j)
| (1.3556261799742658658 + 1.3339779383850503646e-412j)  +/-  (1.3e-125, 1.3e-125j)
| (-1.3556261799742658658 - 7.2282982868771681166e-421j)  +/-  (1.37e-125, 1.37e-125j)
| (-0.66248171638301031012 + 3.736942627909410304e-445j)  +/-  (2.5e-126, 2.5e-126j)
-------------------------------------------------
The weights are:
| (0.0053198387803739524466 + 1.0354588462756992683e-377j)  +/-  (2.94e-45, 1.18e-107j)
| (1.1136705169240414073e-07 - 2.0536164291463242467e-381j)  +/-  (8.22e-51, 3.3e-113j)
| (0.0003982573513460454822 + 1.7191675259125470643e-378j)  +/-  (1e-47, 4.02e-110j)
| (1.2153406331238233849e-05 + 2.7998204970071788926e-380j)  +/-  (1.55e-49, 6.24e-112j)
| (0.0053198387803739524466 + 1.0775630241407164516e-378j)  +/-  (5.28e-47, 2.12e-109j)
| (2.2873946920406558184e-23 - 4.9759583676222112734e-389j)  +/-  (9.87e-59, 3.96e-121j)
| (1.4162985704967727899e-10 - 1.4223767930418389416e-382j)  +/-  (7.63e-54, 3.06e-116j)
| (1.2153406331238233849e-05 - 1.2311363662974272204e-379j)  +/-  (6.09e-51, 2.44e-113j)
| (0.0003982573513460454822 - 2.1400350906625888984e-379j)  +/-  (1.02e-49, 4.1e-112j)
| (1.4162985704967727899e-10 + 5.663013008459703301e-383j)  +/-  (1.2e-53, 4.82e-116j)
| (0.26166981484196443306 + 3.0797837825819511919e-377j)  +/-  (3.05e-48, 1.2e-110j)
| (1.1136705169240414073e-07 + 6.4961173061500576797e-381j)  +/-  (9.61e-53, 3.85e-115j)
| (0.2161292515935058234 - 2.0943152224177411532e-377j)  +/-  (1.91e-48, 7.52e-111j)
| (0.033902787518690986592 - 2.4953304483011307949e-377j)  +/-  (2.84e-49, 1.14e-111j)
| (2.2873946920406558184e-23 + 7.6504793580575272331e-389j)  +/-  (1.42e-60, 5.71e-123j)
| (0.033902787518690986592 - 3.8846358594719784196e-378j)  +/-  (6.71e-50, 2.7e-112j)
| (0.11340269242008818786 + 1.043769955864313038e-377j)  +/-  (2.33e-49, 9.31e-112j)
| (0.11340269242008818786 + 2.9286971036928608603e-377j)  +/-  (8.96e-50, 3.55e-112j)
| (0.2161292515935058234 - 3.3587972820169408734e-377j)  +/-  (2.5e-49, 8.86e-112j)
