Starting with polynomial:
P : t
Extension levels are: 1 18
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Trying to find an order 18 Kronrod extension for:
P1 : t
Solvable: 1
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Ending with final polynomial:
P : t^19 - 171/37*t^17 + 11628/1295*t^15 - 3876/407*t^13 + 75582/12617*t^11 - 75582/33263*t^9 + 16796/33263*t^7 - 50388/831575*t^5 + 12597/3825245*t^3 - 4199/80330145*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:
| (0.99240684384358440319 + 2.8876575181333696578e-421j)  +/-  (3.47e-122, 3.47e-122j)
| (-0.16035864564022537587 - 9.8709110291308795873e-429j)  +/-  (8e-127, 8e-127j)
| (-0.90315590361481790164 + 7.1488100022454574675e-423j)  +/-  (6.32e-122, 6.32e-122j)
| (-8.5427523833207100071e-427 - 1.3440193170449013025e-427j)  +/-  (1.64e-425, 1.64e-425j)
| (0.90315590361481790164 + 4.1170223218048121386e-424j)  +/-  (6.41e-122, 6.41e-122j)
| (0.96020815213483003085 + 5.6556925266458061643e-425j)  +/-  (8.48e-122, 8.48e-122j)
| (-0.96020815213483003085 - 1.7609749716878693688e-427j)  +/-  (7.59e-122, 7.59e-122j)
| (-0.82271465653714282498 + 4.0278189721028896762e-429j)  +/-  (3.43e-122, 3.43e-122j)
| (-0.99240684384358440319 - 2.9033378287044757575e-431j)  +/-  (3.54e-122, 3.54e-122j)
| (0.31656409996362983199 + 5.0833706875413590917e-433j)  +/-  (1.58e-125, 1.58e-125j)
| (0.82271465653714282498 - 8.3950416135984902479e-444j)  +/-  (3.48e-122, 3.48e-122j)
| (0.46457074137596094572 - 3.822551092170864439e-455j)  +/-  (2.31e-124, 2.31e-124j)
| (-0.46457074137596094572 - 4.1760561359499526586e-458j)  +/-  (2.06e-124, 2.06e-124j)
| (-0.60054530466168102347 - 5.0097239947539817152e-461j)  +/-  (1.67e-123, 1.67e-123j)
| (-0.31656409996362983199 + 1.4975058888340403871e-469j)  +/-  (1.58e-125, 1.58e-125j)
| (0.72096617733522937862 + 4.8816510031976979942e-479j)  +/-  (9.88e-123, 9.88e-123j)
| (0.60054530466168102347 - 5.1106847757025469018e-487j)  +/-  (1.77e-123, 1.77e-123j)
| (0.16035864564022537587 + 1.6020637357745173396e-489j)  +/-  (9.69e-127, 9.69e-127j)
| (-0.72096617733522937862 - 2.3262947300689571659e-487j)  +/-  (9.82e-123, 9.82e-123j)
-------------------------------------------------
The weights are:
| (0.019461788229726477036 - 3.6858783131611331877e-421j)  +/-  (1.74e-45, 5.58e-105j)
| (0.15896884339395434765 - 1.0957372684362116379e-421j)  +/-  (7.9e-46, 2.53e-105j)
| (0.069044542737641226581 - 1.7085337294840955732e-422j)  +/-  (1.68e-46, 5.37e-106j)
| (0.16105444984878369598 + 1.3059414075456131126e-421j)  +/-  (3.69e-46, 1.18e-105j)
| (0.069044542737641226581 - 4.1374520064576969192e-421j)  +/-  (1.54e-46, 4.92e-106j)
| (0.044814226765699600333 + 6.0095682578442857114e-421j)  +/-  (1.39e-46, 4.44e-106j)
| (0.044814226765699600333 + 1.4457766829961253233e-422j)  +/-  (5.44e-47, 1.74e-106j)
| (0.091490021622449999464 + 2.1693441015077652759e-422j)  +/-  (2.94e-47, 9.41e-107j)
| (0.019461788229726477036 - 3.6746327372715934482e-423j)  +/-  (1.95e-47, 6.24e-107j)
| (0.15276604206585966678 + 1.7847405739640995387e-421j)  +/-  (6.9e-48, 2.21e-107j)
| (0.091490021622449999464 + 3.3191116639751608415e-421j)  +/-  (6.48e-48, 2.08e-107j)
| (0.14260670217360661178 - 2.0659137297087801558e-421j)  +/-  (3.97e-48, 1.27e-107j)
| (0.14260670217360661178 - 7.1888043176120111474e-422j)  +/-  (7.16e-49, 2.29e-108j)
| (0.12875396253933622768 + 5.4882159010474372175e-422j)  +/-  (4.14e-49, 1.33e-108j)
| (0.15276604206585966678 + 9.0064923761221902998e-422j)  +/-  (6.51e-49, 2.09e-108j)
| (0.11156664554733399472 - 2.7893756376869310021e-421j)  +/-  (7.1e-50, 2.29e-109j)
| (0.12875396253933622768 + 2.3917152847204706436e-421j)  +/-  (6.44e-50, 2.07e-109j)
| (0.15896884339395434765 - 1.5340596106983429153e-421j)  +/-  (5.5e-50, 1.8e-109j)
| (0.11156664554733399472 - 3.8716339598555923499e-422j)  +/-  (3.18e-50, 9.57e-110j)
