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Jan 16, 2020 at 4:05 history became hot network question
Jan 15, 2020 at 20:36 vote accept Seva
Jan 15, 2020 at 20:24 answer added Wojowu timeline score: 13
Jan 15, 2020 at 20:16 comment added Seva @GerhardPaseman: I actually did some computations, which show that $M=48$ does not work: for any given $r_1,r_2,r_3$ co-prime with $48$, and any $\varepsilon\in\{-1,1\}$ there exist primes $p_1,p_2,p_3$ satisfying the condition.
Jan 15, 2020 at 20:09 comment added Gerhard Paseman Working out the details may be messy, but you guys with CAS systems and number theory packages should be able to churn out data and then bin it according to residue by computer in moments. That should point you in the right direction. Gerhard "Assuming There Is A Direction" Paseman, 2020.01.15.
Jan 15, 2020 at 20:02 comment added Seva @Wojowu: I thought of this, but working out the details seems messy (and not clear whether this will eventually work).
Jan 15, 2020 at 19:59 comment added Wojowu I suspect you can take $p_3$ arbitrary, say $1\pmod 4$, and the pick $p_1,p_2$ with $p_1p_2=1\pmod p_3$. I will let someone else work outtge details though
Jan 15, 2020 at 19:53 history asked Seva CC BY-SA 4.0