Starting with polynomial:
P : t
Extension levels are: 1 2 4 8
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Trying to find an order 2 Kronrod extension for:
P1 : t
Solvable: 1
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Trying to find an order 4 Kronrod extension for:
P2 : t^3 - 3/5*t
Solvable: 1
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Trying to find an order 8 Kronrod extension for:
P3 : t^7 - 77/45*t^5 + 749/891*t^3 - 31/297*t
Solvable: 1
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Ending with final polynomial:
P : t^15 - 646576627207/164781456795*t^13 + 343884350900909/55465438357197*t^11 - 36142899049575851/7185295423545975*t^9 + 1577324700316391/714327615206325*t^7 - 3801532399394821/7540124827177875*t^5 + 2102662882898711/40716674066760525*t^3 - 233879228435939/149294471578121925*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
Sufficient bits for target precision reached
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The nodes are:
| (0.99383196321275502221 - 1.8351474525892964671e-209j)  +/-  (2.6e-59, 2.6e-59j)
| (-0.99383196321275502221 - 4.9844512831086808632e-214j)  +/-  (2.55e-59, 2.55e-59j)
| (-0.88845923287225699889 + 2.8636685647613572514e-214j)  +/-  (2.62e-59, 2.62e-59j)
| (0.62110294673722640294 - 7.1115795791556972577e-215j)  +/-  (1.23e-60, 1.23e-60j)
| (0.88845923287225699889 + 9.7379122065597949823e-219j)  +/-  (2.46e-59, 2.46e-59j)
| (0.96049126870802028342 + 7.342265482463772258e-228j)  +/-  (4.51e-59, 4.51e-59j)
| (-0.96049126870802028342 - 8.1300632663127878915e-233j)  +/-  (4.47e-59, 4.47e-59j)
| (-0.77459666924148337704 - 2.011753294032155188e-235j)  +/-  (9.04e-60, 9.04e-60j)
| (-0.434243749346802558 + 3.0563821067192958859e-238j)  +/-  (1.2e-61, 1.2e-61j)
| (0.434243749346802558 - 2.7642411673724269759e-237j)  +/-  (1.26e-61, 1.26e-61j)
| (0.77459666924148337704 - 1.8980537800866579272e-239j)  +/-  (7.87e-60, 7.87e-60j)
| (0.22338668642896688163 - 4.7655008162500785269e-244j)  +/-  (6.38e-63, 6.38e-63j)
| (-0.22338668642896688163 - 3.0234900136712683091e-244j)  +/-  (7.49e-63, 7.49e-63j)
| (-0.62110294673722640294 - 1.6819414645588512448e-243j)  +/-  (1.23e-60, 1.23e-60j)
| (5.9660952044582271557e-271 + 2.1980046720530164918e-272j)  +/-  (8.96e-270, 8.96e-270j)
-------------------------------------------------
The weights are:
| (0.017001719629940260339 + 1.7182645528555682374e-209j)  +/-  (1.14e-17, 3.39e-45j)
| (0.017001719629940260339 + 1.5642714823495877951e-211j)  +/-  (4.2e-18, 1.25e-45j)
| (0.092927195315124537686 + 5.2242131632859853479e-211j)  +/-  (3.37e-18, 1e-45j)
| (0.17151190913639138079 + 2.6181158170802466778e-210j)  +/-  (1.23e-18, 3.66e-46j)
| (0.092927195315124537686 + 9.3371377788641269994e-210j)  +/-  (8e-19, 2.38e-46j)
| (0.051603282997079739697 - 2.3532614629769710937e-209j)  +/-  (9.73e-19, 2.9e-46j)
| (0.051603282997079739697 - 4.0053859150398840411e-211j)  +/-  (5.76e-19, 1.72e-46j)
| (0.13441525524378422036 - 5.7188949986185616712e-211j)  +/-  (1.41e-19, 4.21e-47j)
| (0.20062852937698902103 - 6.5244522392884960711e-211j)  +/-  (2.32e-20, 6.88e-48j)
| (0.20062852937698902103 - 1.6650572111366946522e-210j)  +/-  (1.59e-20, 4.71e-48j)
| (0.13441525524378422036 - 4.6119794917740374188e-210j)  +/-  (3.84e-20, 1.14e-47j)
| (0.2191568584015874964 + 1.1686080964563490393e-210j)  +/-  (3.17e-21, 9.33e-49j)
| (0.2191568584015874964 + 7.3967610242895958864e-211j)  +/-  (1.27e-21, 3.93e-49j)
| (0.17151190913639138079 + 6.0430398839209844763e-211j)  +/-  (1.54e-21, 5.07e-49j)
| (0.22551049979820668739 - 8.9481112836588325396e-211j)  +/-  (9.62e-22, 2.74e-49j)
