{c}

Numerical solution:
``
367554579311
``

Earliest known public leak: https://github.com/lucky-bai/projecteuler-solutions/commit/f7d538c7fa68d4a502da6705fd7ec3afc89e0cf9#diff-37cf8442cb9ce8d4c7401df424ea9362634a8a8733caa930c07346ea624be24fR961

Solution:
* https://github.com/cirosantilli/project-euler-solutions/blob/master/solvers/957.py
* https://github.com/cirosantilli/project-euler-solutions/blob/master/solvers/957.md

https://matharena.ai/euler/ mentions that <MathArena> guys managed to solve it with <GPT-5> and an agent.


 Project Euler problem 957 solution

ID: project-euler-problem-957-solution