An original abstract over the twin primes, the Goldbach conjecture, the friendly numbers, the perfect numbers, the Mersenne composite numbers, and the Sophie Germain primes
2008 ◽
Vol 11
(6)
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pp. 715-726
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2003 ◽
Vol 110
(1)
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pp. 49-52
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1972 ◽
Vol 43
(5)
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pp. 1517-1527
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2018 ◽
Vol 24
(4)
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pp. 18-25
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