Thread: ...factorial(n) plus/minus 1 is semiprime
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Old 2020-09-02, 03:32   #3
CRGreathouse
 
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Aug 2006

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The first few terms are: 5, 8, 10, 13, 20, 24, 26, 34, 59, 392.

392! - 1 = 78958785391722157 * P832.
392! + 1 = 32749 * P844.
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