Perfect number: Revision history


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  • curprev 11:3811:38, 28 August 2023135.0.49.140 talk 37,525 bytes −18 →‎Even perfect numbers: No, being congruent to 1 modulo 9 is not a "reformulation" of the statement "Even perfect numbers (except 6) are of the form T_{2^p - 1} = 1 + \frac{\left(2^p - 2\right) \times \left(2^p + 1\right)}{2} = 1 + 9 \times T_{\left(2^p - 2\right)/3}", but rather follows from it. undo

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