Starting with polynomial:
P : 3/2*t^2 - 1/2
Extension levels are: 2 4 6
-------------------------------------------------
Trying to find an order 4 Kronrod extension for:
P1 : 3/2*t^2 - 1/2
Solvable: 1
-------------------------------------------------
Trying to find an order 6 Kronrod extension for:
P2 : 3/2*t^6 - 25/14*t^4 + 45/98*t^2 - 1/98
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : 3/2*t^12 - 1595/364*t^10 + 318813/66248*t^8 - 10310751/4183088*t^6 + 2471775/4183088*t^4 - 33827/597584*t^2 + 31245/29281616
-------------------------------------------------
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
-------------------------------------------------
The nodes are:
| (0.99105250481616767714 + 6.2601433995836638215e-182j)  +/-  (7.4e-61, 7.4e-61j)
| (-0.99105250481616767714 + 1.1484774357130932124e-180j)  +/-  (7.63e-61, 7.63e-61j)
| (-0.91248695683407599658 - 1.2341756511309135163e-184j)  +/-  (1.44e-60, 1.44e-60j)
| (-0.15655801081562154215 + 8.9632868517887573807e-186j)  +/-  (1.63e-63, 1.63e-63j)
| (0.74677180221832073614 + 2.6573847236873719798e-187j)  +/-  (7.71e-61, 7.71e-61j)
| (0.57735026918962576451 - 3.0137378548865541797e-192j)  +/-  (2.77e-61, 2.77e-61j)
| (-0.43693939954921891801 - 1.3110187756519988885e-194j)  +/-  (5.32e-62, 5.32e-62j)
| (-0.74677180221832073614 - 5.2945739580230278749e-202j)  +/-  (8.43e-61, 8.43e-61j)
| (-0.57735026918962576451 + 1.0242130813415173549e-209j)  +/-  (2.9e-61, 2.9e-61j)
| (0.43693939954921891801 - 3.6202427287847281795e-212j)  +/-  (5.32e-62, 5.32e-62j)
| (0.91248695683407599658 + 1.8449313906306787838e-213j)  +/-  (1.31e-60, 1.31e-60j)
| (0.15655801081562154215 - 1.2535348804080608814e-217j)  +/-  (1.63e-63, 1.63e-63j)
-------------------------------------------------
The weights are:
| (0.032201247709536242362 - 7.1186522963210188096e-182j)  +/-  (4.05e-21, 5.4e-50j)
| (0.032201247709536242362 + 9.6459195608624999779e-181j)  +/-  (1.77e-21, 2.36e-50j)
| (0.12589190344793553342 - 1.502282336869499068e-180j)  +/-  (1.45e-21, 1.94e-50j)
| (0.30876832580322354997 - 4.294243142238077131e-181j)  +/-  (2.73e-22, 3.64e-51j)
| (0.19631482299898778033 - 2.3896596626438149724e-181j)  +/-  (1.61e-22, 2.15e-51j)
| (0.10906302440383816702 + 4.7700336001191078232e-181j)  +/-  (1.83e-22, 2.44e-51j)
| (0.2277606756364787269 + 1.09355454259991708e-180j)  +/-  (1.05e-22, 1.4e-51j)
| (0.19631482299898778033 + 1.2345120074135648942e-180j)  +/-  (4.02e-23, 5.36e-52j)
| (0.10906302440383816702 - 1.5203339096133305672e-180j)  +/-  (5.26e-23, 7.01e-52j)
| (0.2277606756364787269 - 4.7389440925385818882e-181j)  +/-  (8.92e-24, 1.22e-52j)
| (0.12589190344793553342 + 1.4356984431015301398e-181j)  +/-  (1.68e-24, 2.38e-53j)
| (0.30876832580322354997 + 3.2285574876629145419e-181j)  +/-  (4.66e-24, 6.03e-53j)
