Starting with polynomial:
P : t
Extension levels are: 1 4 12
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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 12 Kronrod extension for:
P2 : t^5 - 10/9*t^3 + 5/21*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : t^17 - 8857204/2038671*t^15 + 28927370/3714291*t^13 - 6039926464/813429729*t^11 + 9865688404/2440289187*t^9 - 11887949788/9490013505*t^7 + 122410578862/592447985955*t^5 - 5464102072/355468791573*t^3 + 39745277/118489597191*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:
| (0.9962698516849579968 - 1.7398497211661359933e-422j)  +/-  (1.62e-122, 1.62e-122j)
| (-0.96827060709476223499 - 1.0954585507425324215e-429j)  +/-  (3.15e-122, 3.15e-122j)
| (-0.9061798459386639928 - 2.1329947371469223153e-435j)  +/-  (2.2e-122, 2.2e-122j)
| (-0.9962698516849579968 + 4.7243258602249571185e-438j)  +/-  (1.57e-122, 1.57e-122j)
| (0.96827060709476223499 + 1.4120971955212684186e-444j)  +/-  (2.85e-122, 2.85e-122j)
| (0.9061798459386639928 - 1.6748866059479771581e-459j)  +/-  (1.97e-122, 1.97e-122j)
| (-0.18847441760531908906 - 1.161813777949123718e-471j)  +/-  (1.01e-126, 1.01e-126j)
| (-0.81141684513575577466 + 3.2124773562675088292e-469j)  +/-  (6.35e-123, 6.35e-123j)
| (-0.3701498540017078954 + 4.7906423270029472956e-471j)  +/-  (1.66e-125, 1.66e-125j)
| (0.3701498540017078954 + 2.2198152120887758811e-469j)  +/-  (1.51e-125, 1.51e-125j)
| (0.81141684513575577466 - 9.1903658251798821937e-471j)  +/-  (7.17e-123, 7.17e-123j)
| (0.18847441760531908906 - 3.5013841427220346636e-478j)  +/-  (7.83e-127, 7.83e-127j)
| (-0.53846931010568309104 - 1.0200750115182289451e-478j)  +/-  (1.76e-124, 1.76e-124j)
| (-0.68735255126326749856 + 1.7213976671607639264e-479j)  +/-  (1.61e-123, 1.61e-123j)
| (2.9446217811271993084e-479 - 3.9134175284791497397e-479j)  +/-  (8.33e-478, 8.33e-478j)
| (0.68735255126326749856 - 8.2274543082573503686e-480j)  +/-  (1.74e-123, 1.74e-123j)
| (0.53846931010568309104 + 1.1779730003053500676e-491j)  +/-  (2.09e-124, 2.09e-124j)
-------------------------------------------------
The weights are:
| (0.012129809232142170542 + 1.4012330100522238725e-422j)  +/-  (1.54e-47, 2.02e-106j)
| (0.044983813231863953531 - 2.7579306741842864001e-424j)  +/-  (6.9e-48, 9.05e-107j)
| (0.078882401822426793612 + 3.9096188975967394016e-424j)  +/-  (4.28e-48, 5.62e-107j)
| (0.012129809232142170542 + 1.0591462032039628786e-424j)  +/-  (2.44e-48, 3.21e-107j)
| (0.044983813231863953531 - 1.9350753534518047082e-422j)  +/-  (1.03e-48, 1.36e-107j)
| (0.078882401822426793612 + 8.2560019097090434614e-423j)  +/-  (4.08e-49, 5.35e-108j)
| (0.18619592264798858568 - 9.843343472176997467e-424j)  +/-  (8.53e-50, 1.12e-108j)
| (0.11007602167587800241 - 4.9108259804191970847e-424j)  +/-  (1.32e-49, 1.73e-108j)
| (0.17605818708249021017 + 8.2910117343762393735e-424j)  +/-  (7.3e-50, 9.58e-109j)
| (0.17605818708249021017 + 1.8093975570079383444e-423j)  +/-  (6.46e-51, 8.47e-110j)
| (0.11007602167587800241 - 4.802316034716388811e-423j)  +/-  (5.92e-51, 7.77e-110j)
| (0.18619592264798858568 - 1.4436630125105998343e-423j)  +/-  (6.15e-51, 8.07e-110j)
| (0.15956366065388576874 - 7.0155552877830164849e-424j)  +/-  (5.85e-51, 7.68e-110j)
| (0.13730233425506702533 + 5.916326341194254105e-424j)  +/-  (4.13e-51, 5.43e-110j)
| (0.18961569879651497996 + 1.1816250896662169656e-423j)  +/-  (3.57e-51, 4.69e-110j)
| (0.13730233425506702533 + 3.2244404237065588211e-423j)  +/-  (3.69e-52, 4.96e-111j)
| (0.15956366065388576874 - 2.3519072750477304225e-423j)  +/-  (4.31e-52, 5.53e-111j)
