Tripartite Palindromic Partition of Integer (HP 50g) Challenge

[Gerald H]

You are correct, Albert, that I promote any solution programme that works on a 50g, irrespective of method, nothing against brute force if programme proves efficient.

This paper

https://arxiv.org/abs/1510.07507

suggests that taking largest palindrome less than input will not fulfil my requirements - you may have a better(?) chance of success with some smaller palindrome.