Starting with polynomial:
P : 256*t^8 - 3584*t^6 + 13440*t^4 - 13440*t^2 + 1680
Extension levels are: 8 11
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Trying to find an order 11 Kronrod extension for:
P1 : 256*t^8 - 3584*t^6 + 13440*t^4 - 13440*t^2 + 1680
Solvable: 1
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Ending with final polynomial:
P : 256*t^19 - 19308928/1347*t^17 + 418651520/1347*t^15 - 1521292480/449*t^13 + 9071700160/449*t^11 - 30031939520/449*t^9 + 52723966680/449*t^7 - 43021232100/449*t^5 + 12604959675/449*t^3 - 2144332575/898*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: 0
  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:
| (-2.1885630273880580333 + 3.0806542886214864791e-397j)  +/-  (5.14e-123, 5.14e-123j)
| (4.4838301627422905975 + 1.6337591623566725919e-410j)  +/-  (2.86e-124, 2.86e-124j)
| (-2.9306374202572440192 + 1.3361899163483361208e-408j)  +/-  (1.66e-123, 1.66e-123j)
| (-4.4838301627422905975 - 1.7796478405273285545e-412j)  +/-  (3.3e-124, 3.3e-124j)
| (-3.6473028998600486888 + 2.2313812787531751553e-412j)  +/-  (1.09e-123, 1.09e-123j)
| (2.1885630273880580333 + 3.3228177737954890899e-412j)  +/-  (5.04e-123, 5.04e-123j)
| (2.9306374202572440192 - 8.0494329722664144146e-418j)  +/-  (1.68e-123, 1.68e-123j)
| (-0.56474674797970907162 + 1.9426051645982389313e-421j)  +/-  (7.56e-126, 7.56e-126j)
| (-1.9816567566958429259 + 1.5389610219434049435e-425j)  +/-  (9.24e-123, 9.24e-123j)
| (3.6473028998600486888 - 2.5808474569229936283e-434j)  +/-  (1.1e-123, 1.1e-123j)
| (1.1571937124467801947 - 1.3482038954075339849e-435j)  +/-  (5.25e-125, 5.25e-125j)
| (1.9816567566958429259 - 6.070127538608682775e-434j)  +/-  (8.9e-123, 8.9e-123j)
| (-0.38118699020732211685 - 4.7413467071333127609e-439j)  +/-  (2.33e-126, 2.33e-126j)
| (-1.1571937124467801947 - 7.7200723058455219851e-435j)  +/-  (4.49e-125, 4.49e-125j)
| (-6.3773072445119558003e-439 + 4.0850032580053541762e-439j)  +/-  (1.44e-437, 1.44e-437j)
| (0.56474674797970907162 + 8.9027600980222203246e-438j)  +/-  (7.56e-126, 7.56e-126j)
| (0.38118699020732211685 - 2.6096999230998233874e-438j)  +/-  (2.33e-126, 2.33e-126j)
| (-1.8651745430168657961 + 2.1483683167851199838e-443j)  +/-  (4.95e-123, 4.95e-123j)
| (1.8651745430168657961 + 1.2175872273740510037e-461j)  +/-  (4.42e-123, 4.42e-123j)
-------------------------------------------------
The weights are:
| (0.0060229321895874962813 + 1.9176060683347730339e-398j)  +/-  (5.6e-45, 1.24e-106j)
| (9.9850144742943599715e-10 - 1.1121683017925399346e-405j)  +/-  (2.55e-51, 5.65e-113j)
| (7.2398804921198265073e-05 + 2.2510254919169984227e-401j)  +/-  (1.42e-47, 3.14e-109j)
| (9.9850144742943599715e-10 + 3.2330982694041209462e-405j)  +/-  (1.7e-51, 3.76e-113j)
| (7.1334686475986299527e-07 - 3.5775507070267109362e-403j)  +/-  (1.16e-49, 2.56e-111j)
| (0.0060229321895874962813 + 4.2389850435288549914e-400j)  +/-  (3.7e-48, 8.19e-110j)
| (7.2398804921198265073e-05 - 3.2630649889319919429e-402j)  +/-  (3.9e-50, 8.64e-112j)
| (0.24683866133072504219 + 3.5911351324686844055e-398j)  +/-  (2.51e-46, 5.61e-108j)
| (-0.022707162522935466142 - 4.5486074936114423861e-398j)  +/-  (3.23e-47, 7.16e-109j)
| (7.1334686475986299527e-07 + 8.9424875883430751305e-404j)  +/-  (1.23e-51, 2.72e-113j)
| (0.089049305474983916709 - 2.1023585429587133924e-399j)  +/-  (4.34e-47, 9.62e-109j)
| (-0.022707162522935466142 - 2.2568005094942423728e-399j)  +/-  (3.06e-48, 6.81e-110j)
| (-0.016676020077000314773 - 5.047886272149730214e-398j)  +/-  (1.36e-46, 3.03e-108j)
| (0.089049305474983916709 - 6.8200402734141963776e-399j)  +/-  (6.67e-48, 1.49e-109j)
| (0.32917878888259672127 + 3.4951391547870311945e-398j)  +/-  (3.65e-47, 8.16e-109j)
| (0.24683866133072504219 + 2.1179395583541174063e-398j)  +/-  (3.19e-48, 7.08e-110j)
| (-0.016676020077000314773 - 3.5503175889577926454e-398j)  +/-  (5.27e-48, 1.19e-109j)
| (0.03280977601305355954 + 2.8696925874880036601e-398j)  +/-  (2.76e-49, 6.7e-111j)
| (0.03280977601305355954 + 2.2893083737124357341e-399j)  +/-  (1.88e-49, 3.78e-111j)
