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1995 Tournament Of Towns
(448) 4
TOT 448 1995 Spring A J4 is a+b+c+d prime if ab = cd ?
TOT 448 1995 Spring A J4 is a+b+c+d prime if ab = cd ?
Source:
July 9, 2024
number theory
Problem Statement
Can the number
a
+
b
+
c
+
d
a + b + c + d
a
+
b
+
c
+
d
be prime if
a
,
b
,
c
a, b, c
a
,
b
,
c
and
d
d
d
are positive integers and
a
b
=
c
d
ab = cd
ab
=
c
d
?
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