Impressive. I wonder the methodology. Algorithmic improvements? More probably just an implementational optimisation. Last RSA record was due to special q sieving methods if I recall well, some 3k core hours. I hope there’s a theoretical improvement behind the result.

What was the methodology,software, hardware, cpu cores, time taken?

anddd it's already on wikipedia https://en.wikipedia.org/wiki/RSA_numbers#RSA-260