Starting with polynomial:
P : 5/2*t^3 - 3/2*t
Extension levels are: 3 28
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Trying to find an order 28 Kronrod extension for:
P1 : 5/2*t^3 - 3/2*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : 5/2*t^31 - 41516085547333/2208427829322*t^29 + 8022287302181173/125880386271354*t^27 - 7616809238253747/59174540554910*t^25 + 108169967614894815/627250129882046*t^23 - 2953483425267445/18290312535154*t^21 + 105149018620602705/969386564363162*t^19 - 52140490562462895/987393745125326*t^17 + 18365233589740313/987393745125326*t^15 - 28388247537583665/6065418720055574*t^13 + 204108624919681105/248682167522278534*t^11 - 6531081085531805/67822409324257782*t^9 + 65180466604899285/9201240198324305758*t^7 - 2700878827797633/9201240198324305758*t^5 + 51857615932998145/9210441438522630063758*t^3 - 291588326432565/9210441438522630063758*t
-------------------------------------------------
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
-------------------------------------------------
The nodes are:
| (-0.98410630145298961652 + 9.2647995472213599625e-452j)  +/-  (1.31e-117, 1.31e-117j)
| (-0.96110402596342253767 + 2.9813155912237472128e-463j)  +/-  (1.68e-117, 1.68e-117j)
| (-0.92822406628965235102 + 2.9133943078099248164e-468j)  +/-  (1.3e-117, 1.3e-117j)
| (0.99697642616872827975 + 3.0946447962884742358e-475j)  +/-  (4.9e-118, 4.9e-118j)
| (0.88583871366480735855 - 1.2879007390095871578e-477j)  +/-  (5.87e-118, 5.87e-118j)
| (0.92822406628965235102 - 2.6822810360440785923e-477j)  +/-  (1.16e-117, 1.16e-117j)
| (0.98410630145298961652 + 9.8305211266013790302e-479j)  +/-  (1.36e-117, 1.36e-117j)
| (-0.88583871366480735855 - 8.5204572844492372071e-485j)  +/-  (6.23e-118, 6.23e-118j)
| (-0.99697642616872827975 - 3.5569734864704355342e-498j)  +/-  (5.05e-118, 5.05e-118j)
| (0.96110402596342253767 + 1.5859047964702192868e-509j)  +/-  (1.56e-117, 1.56e-117j)
| (0.83443195446915219778 + 2.5602530061399016532e-512j)  +/-  (2.36e-118, 2.36e-118j)
| (0.28462177099265720081 - 6.7506531556805036321e-520j)  +/-  (2.74e-124, 2.74e-124j)
| (-0.70703197208114496909 - 7.4493523520918380477e-512j)  +/-  (1.73e-119, 1.73e-119j)
| (-0.83443195446915219778 + 2.5058557098607092735e-513j)  +/-  (2.63e-118, 2.63e-118j)
| (-2.1147479709176793604e-522 - 8.1689895968718735053e-523j)  +/-  (7.03e-521, 7.03e-521j)
| (0.70703197208114496909 + 1.7582609758779033041e-514j)  +/-  (1.62e-119, 1.62e-119j)
| (0.6325404225369935573 - 1.6551758978438544643e-516j)  +/-  (3e-120, 3e-120j)
| (-0.095404851378700209159 + 7.2132721880681726275e-524j)  +/-  (8.08e-127, 8.08e-127j)
| (-0.77459666924148337704 + 9.6426573425861274738e-519j)  +/-  (6.87e-119, 6.87e-119j)
| (-0.37697617180685685466 + 5.4983619344105267576e-520j)  +/-  (3.58e-123, 3.58e-123j)
| (0.37697617180685685466 - 1.609899506741068191e-519j)  +/-  (3.65e-123, 3.65e-123j)
| (0.77459666924148337704 + 5.6769104450791300329e-520j)  +/-  (6.89e-119, 6.89e-119j)
| (0.095404851378700209159 - 2.5059342133880777618e-527j)  +/-  (8.08e-127, 8.08e-127j)
| (-0.46647921730837471396 - 1.4439539842515790605e-520j)  +/-  (4.47e-122, 4.47e-122j)
| (-0.55202440766185927029 - 2.1484761241379911306e-518j)  +/-  (4.31e-121, 4.31e-121j)
| (0.19047286522906600477 + 9.4467439170475737297e-525j)  +/-  (1.53e-125, 1.53e-125j)
| (0.55202440766185927029 + 1.8191523607338656508e-522j)  +/-  (4.3e-121, 4.3e-121j)
| (0.46647921730837471396 - 1.0996657048977854389e-521j)  +/-  (4.27e-122, 4.27e-122j)
| (-0.28462177099265720081 - 2.0797043788804053665e-522j)  +/-  (2.23e-124, 2.23e-124j)
| (-0.6325404225369935573 - 3.4895546553576706954e-521j)  +/-  (2.88e-120, 2.88e-120j)
| (-0.19047286522906600477 - 1.2478625589013865849e-527j)  +/-  (1.52e-125, 1.52e-125j)
-------------------------------------------------
The weights are:
| (0.017968021411418525805 + 5.3323487949527830227e-452j)  +/-  (1.79e-25, 3.58e-81j)
| (0.027993696562949660857 - 1.4320351639946610187e-451j)  +/-  (1.1e-25, 2.2e-81j)
| (0.037704112837272227564 + 9.4745228775848231961e-452j)  +/-  (6.44e-26, 1.29e-81j)
| (0.0077552051555116041628 - 2.3902329814054865173e-454j)  +/-  (1.32e-27, 2.64e-83j)
| (0.046985883351477510465 - 4.0895717361434471146e-453j)  +/-  (9.38e-28, 1.88e-83j)
| (0.037704112837272227564 + 2.7686508797719911906e-453j)  +/-  (8.96e-28, 1.79e-83j)
| (0.017968021411418525805 + 8.4579336800689877006e-454j)  +/-  (5.51e-28, 1.1e-83j)
| (0.046985883351477510465 - 7.7820921975272716538e-452j)  +/-  (1.18e-28, 2.35e-84j)
| (0.0077552051555116041628 + 3.6792567119970079126e-452j)  +/-  (2.15e-28, 4.3e-84j)
| (0.027993696562949660857 - 1.6933936083222534703e-453j)  +/-  (2.62e-28, 5.24e-84j)
| (0.055728777453000264957 + 5.6948126653681427887e-453j)  +/-  (1.53e-29, 3.07e-85j)
| (0.093417579659263787473 - 3.1911415740472504525e-452j)  +/-  (6.18e-32, 1.24e-87j)
| (0.071170350329377660293 + 6.1107025877494008795e-452j)  +/-  (3.94e-31, 7.9e-87j)
| (0.055728777453000264957 + 6.9191781363815106907e-452j)  +/-  (4.14e-30, 8.28e-86j)
| (0.095450740848725708985 + 5.0602673308890372264e-452j)  +/-  (2.13e-32, 4.26e-88j)
| (0.071170350329377660293 + 1.0011711330697498793e-452j)  +/-  (1.21e-31, 2.42e-87j)
| (0.077662249777420747993 - 1.2903667077126914985e-452j)  +/-  (4.42e-32, 8.86e-88j)
| (0.095307523586183868765 - 5.4641323411693910769e-452j)  +/-  (3.04e-33, 6.09e-89j)
| (0.063825228744862435985 - 6.4154125038193870105e-452j)  +/-  (2.89e-32, 5.79e-88j)
| (0.091112741935385519717 + 5.8088275988522985679e-452j)  +/-  (3.65e-34, 7.31e-90j)
| (0.091112741935385519717 + 2.5911098867776968265e-452j)  +/-  (8.43e-34, 1.69e-89j)
| (0.063825228744862435985 - 7.6425111946556912681e-453j)  +/-  (1.08e-32, 2.17e-88j)
| (0.095307523586183868765 - 4.4983160407905772656e-452j)  +/-  (4.92e-34, 9.86e-90j)
| (0.087707551344503254363 - 5.8134047800377641461e-452j)  +/-  (4.68e-35, 9.37e-91j)
| (0.083203649842928553175 + 5.844446323335163298e-452j)  +/-  (3.66e-35, 7.33e-91j)
| (0.094732057584081523932 + 3.8472530849239101576e-452j)  +/-  (9.19e-35, 1.84e-90j)
| (0.083203649842928553175 + 1.6439222395356241323e-452j)  +/-  (2.4e-35, 4.8e-91j)
| (0.087707551344503254363 - 2.0744559533539539782e-452j)  +/-  (1.88e-35, 3.77e-91j)
| (0.093417579659263787473 - 5.7881064152734342804e-452j)  +/-  (1.73e-36, 3.48e-92j)
| (0.077662249777420747993 - 5.9336449748799959672e-452j)  +/-  (9.21e-37, 1.93e-92j)
| (0.094732057584081523932 + 5.6939427149208125021e-452j)  +/-  (1.85e-36, 3.67e-92j)
