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The options include complete disappearance into radiation, a stable tiny leftover, a white hole, or a disconnected baby universe.","posed_since":"","precise":"For a Schwarzschild black hole evaporating from $M \\gg m_P=\\sqrt{\\hbar c/G}$, approximately $2.2 \\times 10^{-5}\\,\\mathrm{g}$, determine the final state at $M \\sim m_P$: complete evaporation with a pure final radiation state, a stable or long-lived remnant, a black-to-white-hole transition, or topology change. 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