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This gives you the prime factorization of a number: 2 *2 *2 *2*3, as you climb the stairs while dividing. (two divides into 72, 36 times. Two divides into 36, 18 times. Two divideds into 19, 9 times. Three divides into 9, 3 times.) 3[3 2[9 2[18 2[36 2[72

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16y ago

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