Today when I tried to solve a problem, I found that I'm getting Runtime Error because of using nextProbablePrime() and isProbablePrime().

See:

• Accepted submission: 8859588
• Runtime Error submission: 8859569

The only difference is in Accepted submission, I used my own nextProbablePrime().

Previously, I read on Codeforces that MikeMirzayanov solved this issue: /blog/entry/10037. Though looks like it is broken again.. :(