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A355727
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First of four consecutive primes p, q, r, s where q*s == p (mod r).
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1
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47, 139, 167, 257, 421, 557, 587, 647, 1021, 1051, 1217, 1601, 1759, 2957, 3803, 3911, 4007, 4397, 4423, 4463, 5351, 5471, 6257, 6691, 6857, 6949, 7577, 8081, 9109, 9697, 10223, 10847, 11927, 12101, 12601, 12911, 13669, 13711, 13751, 14537, 14621, 16217, 16607, 16903, 17021, 17359, 17477, 17911
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(3) = 167 is a term because 167, 173, 179, 181 are consecutive primes with 173*181 == 167 (mod 179).
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MAPLE
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p2:= 2: p3:= 3: p4:=5: count:= 0: R:= NULL:
while count < 100 do
p1:= p2; p2:= p3; p3:= p4; p4:= nextprime(p4);
if p2*p4 -p1 mod p3 = 0 then
count:= count+1;
R:= R, p1;
fi;
od:
R;
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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