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Date: 25-10-2020
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Date: 13-1-2021
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Date: 10-4-2020
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An integer which is a product of distinct primes and which satisfies
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(Butske et al. 1999). The first few are 2, 6, 42, 1806, 47058, ... (OEIS A054377).
The similar equation
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arises in the definition of Giuga numbers.
REFERENCES:
Borwein, D.; Borwein, J. M.; Borwein, P. B.; and Girgensohn, R. "Giuga's Conjecture on Primality." Amer. Math. Monthly 103, 40-50, 1996.
Butske, W.; Jaje, L. M.; and Mayernik, D. R. "The Equation , Pseudoperfect Numbers, and Partially Weighted Graphs." Math. Comput. 69, 407-420, 1999.
Cao, Z.; Liu, R.; and Zhang, L. "On the Equation and Znám's Problem." J. Number Th. 27, 206-211, 1987.
Ke, Z. and Sun, Q. "On the Representation of 1 by Unit Fractions." Sichuan Daxue Xuebao 1, 13-29, 1964.
Sloane, N. J. A. Sequence A054377 in "The On-Line Encyclopedia of Integer Sequences."
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هدر الطعام في رمضان.. أرقام وخسائر صادمة
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كالكوبرا الباصقة.. اكتشاف عقرب نادر يرش السم لمسافات بعيدة
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المجمع العلمي يقيم عددًا من المجالس الرمضانية بمحافظة نينوى
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