Quote from: HABJo12 on Today at 07:51:15 AM

failed to open /dev/urandom

Windows does not have /dev/urandom. The way random numbers are generated must be changed in the code. Here is the relevant discussion and contact the author:

https://bitcointalk.org/index.php?topic=5544649.0

Quote from: cctv5go on Today at 08:22:08 AM

Solving puzzle 71 is actually quite simple, but we haven't found the appropriate code yet.JeanLucPons may be able to easily solve such puzzles.But I have never seen him discuss this topic here, perhaps it is a mystery.He is an excellent developer.

Even with JeanLucPons' expertise, solving the 71-bit puzzle requires approximately 3,000 GPUs running for months. Or a massive GPU farm, due to the brute-force nature of the search (2⁷¹ keys).

A 1000x faster implementation would still demand 3 GPUs running for months or a custom supercomputer.

This isn’t about miracles. It’s about physics. Even with perfect parallelism, the energy, cost, and time required make it unrealistic without quantum breakthroughs or a flaw in the puzzle’s design (which is not the case here) .

If JeanLuc ever discovers a clever mathematical shortcut, we’d all celebrate.... Until then, it remains a hardware-bound challenge. Wink