Starting with polynomial:
P : t
Extension levels are: 1 4
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Trying to find an order 4 Kronrod extension for:
P1 : t
Solvable: 1
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Ending with final polynomial:
P : t^5 - 10*t^3 + 15*t
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Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 53
Linear system for weights solvable: 1
  current precision for roots: 106
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 106
Linear system for weights solvable: 1
Sufficient bits for target precision reached
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The nodes are:
| (2.8569700138728056542 - 1.5778294212385607916e-388j)  +/-  (7.46e-127, 7.46e-127j)
| (-1.3556261799742658658 + 7.506294097500999255e-388j)  +/-  (5.84e-127, 5.84e-127j)
| (-2.8569700138728056542 + 2.4836243798296210424e-411j)  +/-  (7.46e-127, 7.46e-127j)
| (0 - 5.7620808097444533243e-646j)  +/-  (2.88e-645, 2.88e-645j)
| (1.3556261799742658658 - 6.4825621050129162981e-465j)  +/-  (5.84e-127, 5.84e-127j)
-------------------------------------------------
The weights are:
| (0.011257411327720688933 - 6.3720301182786380829e-390j)  +/-  (1.05e-30, 2.31e-126j)
| (0.2220759220056126444 + 1.1111646589063415703e-388j)  +/-  (7.65e-30, 1.73e-125j)
| (0.011257411327720688933 + 2.5309442976050622219e-389j)  +/-  (4.75e-31, 1.04e-126j)
| (0.53333333333333333333 - 1.8628244615481970143e-388j)  +/-  (3.06e-30, 9.92e-126j)
| (0.2220759220056126444 + 5.622856740641356026e-389j)  +/-  (3.65e-30, 6.55e-126j)
