It's calculating prime numbers which is why it's slow. Now if only I was to work...

random123456789 · on June 24, 2019

Hints: Prime numbers, Palindromes, XOR and offset for later :)

aereal · on June 23, 2019

have you guys figured it out? I got stuck here too.

gctfthroaway · on June 25, 2019

I'm having a hard time even getting it to run.

"python vm.py program" results in "SyntaxError: Non-ASCII character '\xf0' in file vm.py on line 19, but no encoding declared;"

adding the relevant encoding (# -- coding: utf-8 --) then results in "RuntimeError: Unknown instruction ''\xf0\x9f\x96\x8b\xf0\x9f\x92\xa0\xf0\x9f\x94\xb6\xf0\x9f\x8e\x8c\xf0\x9f\x9a\xa9\xf0\x9f\x8f\x81'' at 370"

I assume debugging the program is part of the challenge? Or is it just supposed to work?

grafporno · on June 28, 2019

Run it with python3, not 2.7X

tbarbour · on June 24, 2019

https://github.com/InverseIntegral/ctf_writeups/tree/master/... - great write up of the solution here