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when toggle format what by license comment
Mar 11, 2020 at 11:59 comment added Per Alexandersson @GerryMyerson In fact, it more than a 16-digit number..
Mar 8, 2020 at 21:10 comment added Gerry Myerson I'm sure that the smallest $n$ for which no solution is known is more than a 7-digit number.
Mar 8, 2020 at 14:26 history answered Glorfindel CC BY-SA 4.0