Nonexistence of odd perfect numbers of a certain form

被引:0
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作者
Evans, Ronald [1 ]
Pearlman, Jonathan [2 ]
机构
[1] Univ Calif San Diego, Dept Math, La Jolla, CA 92093 USA
[2] Univ Calif Berkeley, Dept Ind Engn & Operat Res, Berkeley, CA 94702 USA
来源
FIBONACCI QUARTERLY | 2007年 / 45卷 / 02期
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中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Write N = p(alpha)q(1)(2 beta 1)... q(k)(2 beta k) where p, q(1),..., q(k) are distinct odd primes and p equivalent to alpha equivalent to 1 4). An odd perfect number, if it exists, must have this form. McDaniel proved in 1970 that N is not perfect if all beta(i) are congruent to 1 (mod 3). Hagis and McDaniel proved in 1975 that N is not perfect if all beta(i) are congruent to 17 (mod 35). We prove that N is not perfect if all beta(i) are congruent to 32 (mod 65). We also show that N is not perfect if all beta(i) are congruent to 2 (mod 5) and either 7 vertical bar N or 3 vertical bar N. This is related to a result of Iannucci and Sorli, who proved in 2003 that N is not perfect if each beta(i) is congruent either to 2 (mod 5) or 1 (mod 3) and 3 vertical bar N.
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页码:122 / 127
页数:6
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