title: OverflowError: Python int too large to convert to C long when feed data into numpy array
body: <p>I am trying to feed large number after encryption into a numpy array, but it says the number is too long and it gets overflow. I checked the code, everything is correct before I feed the numbers into the numpy array, but it got an error at the step of feeding in the data, which is <code>en1[i,j] = pk.raw_encrypt(int(test1[i,j]))</code>.</p>
  <p>The encrypted number I have got here is <code>3721469428823308171852407981126958588051758293498563443424608937516905060542577505841168884360804470051297912859925781484960893520445514263696476240974988078627213135445788309778740044751099235295077596597798031854813054409733391824335666742083102231195956761512905043582400348924162387787806382637700241133312260811836700206345239790866810211695141313302624830782897304864254886141901824509845380817669866861095878436032979919703752065248359420455460486031882792946889235009894799954640035281227429200579186478109721444874188901886905515155160376705016979283166216642522595345955323818983998023048631350302980936674</code>. Python3 still claims it to be a int type. The number itself did not get overflow, but the numpy array does not allow it to be filled in.</p>
  <p>What property of the numpy caused this, and is there any solution to this problem? I have considered using list to substitute numpy array but it will be rather hard to implement when it is not a 1-D array. I have attached the full test code below.</p>
  <pre><code>test1 = np.array([[1,2,3],[1,2,4]])
  test2 = np.array([[4,1,3],[6,1,5]])
  
  en1 = np.copy(test1)
  en2 = np.copy(test2)
  
  pk, sk = paillier.generate_paillier_keypair()
  
  en_sum = np.copy(en1)
  pl_sum = np.copy(en1)
  
  for i in range(test1.shape[0]):
      for j in range(test2.shape[1]):
          en1[i,j] = pk.raw_encrypt(int(test1[i,j]))
          en2[i,j] = pk.raw_encrypt(int(test2[i,j]))
  
          en_sum[i,j] = en1[i,j]*en2[i,j]
          pl_sum[i,j] = sk.raw_decrypt(en_sum[i,j])
  
  sum = sk.raw_decrypt(en_sum)
  </code></pre>