A real daily lucky number from Ulam's 1956 sieve — shaped by date, season, time and place, with the full reasoning shown. Every day has a lucky number. Sieve of Fortune finds yours — and shows its work. Most lucky-number apps invent a number out of thin air. This one draws it from genuine mathematics: the lucky-number sieve defined in 1956 by Gardiner, Lazarus, Metropolis and Ulam. Their sieve strikes out numbers by position rather than value, and what survives — 1, 3, 7, 9, 13, 15, 21, 25, 31… — behaves eerily like the primes. Your daily number is always one of these true survivors. INSTALL
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