That could really be a great thing! The problem is that Mersenne primes are "sparse", i.e. there aren't many of them. Finding one could be like minting a new bl

That could really be a great thing! The problem is that Mersenne primes are "sparse", i.e. there aren't many of them. Finding one could be like minting a new block, but it would be so rare that it won't be practical. For crypto, you would need something with many solutions, but then it's probably not so useful to find yet another solution...