[SciPy-User] hyp1f1(0.5, 1.5, -2000) fails

Hi, I noticed, that hyp1f1(0.5, 1.5, -2000) fails: In [5]: scipy.special.hyp1f1(0.5, 1.5, 0) Out[5]: 1.0 In [6]: scipy.special.hyp1f1(0.5, 1.5, -20) Out[6]: 0.19816636482997368 In [7]: scipy.special.hyp1f1(0.5, 1.5, -200) Out[7]: 0.062665706865775023 In [8]: scipy.special.hyp1f1(0.5, 1.5, -2000) Warning: invalid value encountered in hyp1f1 Out[8]: nan The values [5], [6] and [7] are correct. The value [8] should be: 0.019816636488030055... Ondrej