#!/usr/bin/env python
# coding: utf-8

# In[1]:


from PIL import Image
import numpy as np
import matplotlib.pyplot as plt
get_ipython().run_line_magic('matplotlib', 'inline')


# In[2]:


im = Image.open('tomkooij.png')


# In[3]:


im.load()


# In[4]:


arr = np.asarray(im)
arr


# In[5]:


plt.imshow(arr)


# In[6]:


y_size, x_size, _ = arr.shape
x_size = 79


# In[7]:


number_grid = np.zeros((y_size, x_size))


# In[8]:


for y in range(y_size):
    for x in range(x_size):
        rgb = arr[y][x]
        number_grid[y][x] = sum(rgb)
    


# In[9]:


number_grid[number_grid <= 500] = 1
number_grid[number_grid > 500] = 8
number_grid


# In[10]:


plt.imshow(number_grid)


# In[11]:


number_grid.shape


# In[12]:


# shrink height: throw away every other line
number_grid = np.delete(number_grid, np.s_[::2], axis=0)
number_grid.shape


# In[13]:


def float_to_char(x):
    if x > 2.: return '1'
    return '8'


# In[14]:


prime_str = ''
for line in number_grid:
    l = ''.join((float_to_char(x) for x in line))
    print(l)
    prime_str += l


# In[15]:


p = int(prime_str)


# In[16]:


p > 1e100


# In[17]:


p > 1e1000


# In[18]:


p > 1e400


# In[19]:


p > 1e300


# In[20]:


p > 1e310


# In[ ]: