Starting with polynomial:
P : 2*t
Extension levels are: 1 16
-------------------------------------------------
Trying to find an order 16 Kronrod extension for:
P1 : 2*t
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : 2*t^17 - 136*t^15 + 3570*t^13 - 46410*t^11 + 1276275/4*t^9 - 2297295/2*t^7 + 16081065/8*t^5 - 11486475/8*t^3 + 34459425/128*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
Positive weights:   17 out of 17
Indefinite weights: 0 out of 17
Negative weights:   0 out of 17
Extension rule has valid weights: 1
-------------------------------------------------
The nodes are:
| (-2.7577629157038887309 + 1.1455482795355022454e-186j)  +/-  (4.13e-60, 4.13e-60j)
| (3.3789320911414940834 + 7.9781860303905870647e-191j)  +/-  (4.93e-60, 4.93e-60j)
| (-4.8713451936744030883 + 2.3515563179344686696e-199j)  +/-  (1.35e-60, 1.35e-60j)
| (4.8713451936744030883 + 6.0199841739122397942e-197j)  +/-  (1.63e-60, 1.63e-60j)
| (-4.0619466758754743069 + 2.939445397418085837e-200j)  +/-  (3.04e-60, 3.04e-60j)
| (1.6129243142212313331 - 2.5475193444290077254e-199j)  +/-  (5.06e-61, 5.06e-61j)
| (-1.6271087185081542211e-285 - 2.62806898124642894e-207j)  +/-  (4.47e-206, 4.47e-206j)
| (-0.53163300134265473135 + 8.978992346204813098e-205j)  +/-  (9.2e-63, 9.2e-63j)
| (-2.1735028266666208193 + 7.4953306032253707867e-203j)  +/-  (1.68e-60, 1.68e-60j)
| (-3.3789320911414940834 + 3.9868779804390270142e-204j)  +/-  (5.97e-60, 5.97e-60j)
| (1.0676487257434505536 - 2.0931109397304891825e-204j)  +/-  (7.58e-62, 7.58e-62j)
| (2.7577629157038887309 + 1.1938855036333603692e-208j)  +/-  (3.95e-60, 3.95e-60j)
| (-1.6129243142212313331 - 4.815840218516844064e-218j)  +/-  (4.61e-61, 4.61e-61j)
| (-1.0676487257434505536 - 1.8147927294043254285e-219j)  +/-  (7.58e-62, 7.58e-62j)
| (4.0619466758754743069 + 1.9787209020202393523e-226j)  +/-  (3.92e-60, 3.92e-60j)
| (2.1735028266666208193 - 3.0663966836855247184e-243j)  +/-  (1.66e-60, 1.66e-60j)
| (0.53163300134265473135 - 1.0649848921181807323e-249j)  +/-  (9.2e-63, 9.2e-63j)
-------------------------------------------------
The weights are:
| (0.00016849143155133847317 + 5.3229013896822977142e-190j)  +/-  (1.73e-21, 1.58e-50j)
| (4.0126794479798523561e-06 - 4.854916648903468838e-192j)  +/-  (1.36e-23, 1.24e-52j)
| (2.584314919374907689e-11 + 3.5764706904720645281e-194j)  +/-  (6.32e-26, 5.76e-55j)
| (2.584314919374907689e-11 - 9.9078037143844615315e-195j)  +/-  (1.28e-26, 1.17e-55j)
| (2.8080161179305686591e-08 - 1.9105680000388432042e-192j)  +/-  (9.56e-25, 8.72e-54j)
| (0.023086657025710961025 + 5.1694537708458840331e-190j)  +/-  (2.92e-21, 2.66e-50j)
| (0.29953837012660542072 - 2.9510422072154814322e-189j)  +/-  (1.87e-20, 1.69e-49j)
| (0.22670630846897692753 + 3.1804330774002082152e-189j)  +/-  (1.26e-20, 1.14e-49j)
| (0.0028589460622846210812 - 1.360816476748929406e-189j)  +/-  (3.47e-22, 3.17e-51j)
| (4.0126794479798523561e-06 + 4.795227495894326047e-191j)  +/-  (7.95e-24, 7.25e-53j)
| (0.097406371162721133173 - 1.2131808318705494456e-189j)  +/-  (1.47e-21, 1.33e-50j)
| (0.00016849143155133847317 + 3.4998202407297260632e-191j)  +/-  (2.04e-24, 1.87e-53j)
| (0.023086657025710961025 + 1.9735113984201365507e-189j)  +/-  (3.61e-22, 3.27e-51j)
| (0.097406371162721133173 - 2.7458810233549069485e-189j)  +/-  (8.45e-22, 7.71e-51j)
| (2.8080161179305686591e-08 + 3.6533359983362262881e-193j)  +/-  (1.84e-26, 1.66e-55j)
| (0.0028589460622846210812 - 1.6123747041099742843e-190j)  +/-  (6.7e-24, 6.28e-53j)
| (0.22670630846897692753 + 2.1524018345073795523e-189j)  +/-  (2.45e-22, 1.86e-51j)
