IMPOSSIBLE TO SOLVE

123456789101112131415
Across
  1. 4. impossible to get this... (it's also the password)
  2. 5. 16+16
  3. 8. 512+512
  4. 10. 4096+4096
  5. 12. 8+8
  6. 13. 16384+16384
  7. 15. _2+2 (place underscore before this)
Down
  1. 1. 2048+2048
  2. 2. _1+1 (place underscore before this)
  3. 3. 32+32
  4. 4. 8192+8192
  5. 6. 256+256
  6. 7. _4+4 (place underscore before this)
  7. 9. 128+128
  8. 11. 64+64
  9. 14. 1024+1024