I have a bunch of unused 4090s and 5090s lying around. Could you point me to the latest and most optimised public repo/codebase to run? I can share some benchmarks here.

What would you say is cheap price for 4090 renting in bulk say 1000 nos or more for 6 months? Also any guess on cracking rate of private repos on 4090 with super optimized cuda/ptx code?

Say for something like XopMC/CudaBrainSecp on GPU - where we have to do point multiplications for all keys, do you know what's the current best implementation? Or do you have any ideas to make it faster? Here, we can't use point additions as pvt keys are unrelated to each other.

Could you name some of the data centers which could beat vast.ai interruptible pricing? I have 100s of GPUs running on vast.ai and clore.ai. I would love to rent 1000s more of consumer grade GPUs for a task not related to this puzzle tx.

I agree 100%. But I have checked 10s of websites and cheapest ones are vast.ai interruptible ones. And you can't rent more than 200 GPUs without price going up massively. Using that as benchmark I got 1.5 mil price tag.

It will take 5k 4090 GPUs * 114 days (total of 13.7m gpu hrs) to solve 69 puzzle which is 2^68 keys of work.

At cheap prices of 0.1 usd/gpu/hr it costs 1.37m usd.

Based on info from chatgpt, even for datacenters running at 2 cents/kwh and 5 year depreciation on hardware - it costs 800k. Which barely breaks even.

We should also note that this particular puzzle 69, the key was unusually beginning of the search space which is an absolute win if the cracker was working on batches sequentially.

In any case, puzzle 68 was profitable for data centers and break even for bulk renters.
Puzzle 69 is break even for data centers.

So, puzzle 71 (which is 4x harder and resource intensive than 69) in theory should be uncrackable. Unless you have compromised a whole data center and stealing their 1000s of GPU compute resources and they didn't notice for months.

What are your thoughts on this?

Nah I read the original victim court doc and compliant letter/fir which I got from bank manager. They said they were scammed via investment route. Invest 50 lakhs you will get 1 crore such types. Scammers have an app (like zerodha) or something to take money and show fake profits and let them withdraw some/all profits. Get them to invest more and more and after sometime scam them. Something like that.

Then they use tons of bank accounts to route these funds finally crypto p2p so it's not traceable.

Thing is, the p2p seller on Binance has 1000 reviews all good. And in the week of trade I did, they started getting 10s of bank account freeze reviews. Which started after my trade. So, they are maintaining good Binance accounts for months and then using them to do this scam. Or buying Binance accounts.

SBI

Wanted to ask, given the latest puzzle and last couple of solved puzzles are unprofitable to crack by renting from, say vast.ai or clore.ai, what do you guys think these people who cracked last couple of puzzles rented those 1000s of GPUs?

Current prices say they should spend around 1.5 million usd to crack 6.9 btc puzzle which is not at all profitable. So, how are they doing it? Stolen/hacked GPU compute?

Earlier this year my SBI bank account was frozen because I did 3 P2P transactions of 2 lakhs each. The guy asked me if he can do third-party transfer and I didn't know about any of these scams back in Jan and said fine. He sent those funds from some Hotel/Restaurant account. Which I can see on bank statement. Never thought of it.

Then in March, my bank account was frozen, bank manager called and gave some docs saying someone in Bihar lost 2 crores someone in MP lost 30 lakhs and 6 lakhs of those funds came to my account. 2 lakhs Layer 2. 4 lakhs Layer 4. Complaint of victim who lost those funds and how they lost it and tons of bank tx from scammer account how they moved those funds. Bihar, MP cyber cell asking bank and bank hq asking local bank manager to freeze my whole account mails. And some court proceedings etc. Probably 50 pages total.

I am from Telangana and I sent all these docs to my lawyer friends and they said, it's third-party in your Binance P2P and victims complaints are legit. So, either you have to visit those police stations and fight in those states courts or give up those funds. Nothing much you can do.

I am reeling from that and a week or so later I got call from local district headquarters cyber cell and asked me about my occupation and asked me to visit them and provide information about my bank and my transactions how I got those funds and such so they can clear my name.

I went and provided everything on top of 10k bribe to clear my name from this huge 2.3 crores scam. From the docs I got from bank manager, I can see like 30 pages of transactions where the funds went. 3 transactions end up in my account. 100s more in random accounts in random banks all over country. Not even sure why I have to prove my innocence here. But hey, it's just local cyber cell guys just want some bribes.

Then somehow randomly, hold on my account was removed and 2 lakhs from MP case became free. I moved all my funds 2 from this case and 2 more of my other funds stuck because of account freeze to another bank acc and withdrawn. 4 lakhs still stuck. Met bank manager and he said it happened randomly we don't know. They probably cleared you from case you are free to take those but 4 lakhs still stuck.

In mid July bank manager got court order to transfer 4 lakhs which were frozen from my acc to victim in Bihar it seems. He said, I have to visit courts and stop this and send him update asap or he will have to transfer as per ruling. 2 of my lawyers said it's lost cause, victim probably bribed heavily local police/cyber cell/courts that's why they moved so fast in freezing and court order and all. You have to spend weeks in Bihar talking to police, filing court cases and all and probably bribe and spend around 2 lakhs (including travel and stay) with 50/50 chances of getting back my 4 lakhs (given the original victim also legit and I did third-party p2p) and be away from my work for weeks. So I gave up on that idea.

Last week bank manager did the transfer and it's done. Is there anything I should have done differently?