nc 18.104.22.168 23333
var net = require('net');
nc 22.214.171.124 10004
When yafu delete factors, it fails to update the factor type correctly. So it’s possible to fool yafu if you use a smooth number which consists of many small primes. Follow the link in
solve.pyfor more details.
I expect someone would find it when feeding some special cases (like the smooth number as mentioned above) towards yafu. But maybe most players instead focused on the prime test. I released a hint (yafu can be wrong) but seems (as xdd suggested) they just turned to prime test inside yafu lol.