import numpy
print numpy.__version__
for s in range(1864100, 1864200):
    if numpy.ones((s, 9), numpy.float32).sum()!= s*9:
        print '\nbroke', s
        break
    else:
        print '\r',s,

C:\temp>python np_sum.py
1.8.0b2
1864135
broke 1864136


import numpy
print numpy.__version__
for s in range(1864130*9, 1864135*9):
    if numpy.ones((s, 1), numpy.float32).sum()!= s:
        print '\nbroke', s
        break
    else:
        print '\r',s,
C:\temp>python np_sum.py
1.8.0b2
16777214