Unable to compute mpmath.legenp(Even number, Odd number, 0)

[hsiatein]

My code:

And output:
C:\Users\30236\mpmathtest\Scripts\python.exe D:\python\mpmathtest\main.py
Traceback (most recent call last):
File "D:\python\mpmathtest\main.py", line 3, in
print(mpmath.legenp(10,1,0))
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\30236\mpmathtest\Lib\site-packages\mpmath\functions\orthogonal.py", line 379, in legenp
return ctx.hypercomb(h, [n,m], **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\30236\mpmathtest\Lib\site-packages\mpmath\functions\hypergeometric.py", line 125, in hypercomb
v = ctx.fprod([ctx.hyper(a_s, b_s, z, **kwargs)] +
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\30236\mpmathtest\Lib\site-packages\mpmath\functions\hypergeometric.py", line 226, in hyper
if q == 1: return ctx._hyp2f1(a_s, b_s, z, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\30236\mpmathtest\Lib\site-packages\mpmath\functions\hypergeometric.py", line 443, in _hyp2f1
return ctx.hypsum(2, 1, (atype, btype, ctype), [a, b, c], z, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\30236\mpmathtest\Lib\site-packages\mpmath\ctx_mp.py", line 708, in hypsum
raise ValueError(ctx._hypsum_msg % (prec, prec+extraprec))
ValueError: hypsum() failed to converge to the requested 1964 bits of accuracy
using a working precision of 5479 bits. Try with a higher maxprec,
maxterms, or set zeroprec.

Then I tried several other parameter combinations and found that the program was unable to compute mpmath.legenp(Even number, Odd number, 0).

for example mpmath.legenp(2, 1, 0), mpmath.legenp(4, 1, 0), mpmath.legenp(4, 3, 0)...

[skirpichev]

Have you tried a suggestion: "Try with a higher maxprec, maxterms, or set zeroprec"?