The 4-Nicol Numbers Having Five Different Prime Divisors
Qiao-Xiao Jin and Min Tang
Department of Mathematics
Anhui Normal University
P. R. China
A positive integer
is called a Nicol number if
, and a t
-Nicol number if
. In this paper, we show that if
4-Nicol number that has five different prime divisors, then
Full version: pdf,
Received April 12 2011;
revised version received July 7 2011.
Published in Journal of Integer Sequences, September 4 2011.
Revised, April 11 2012.
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