yangxin's submissions for 1181 对称三位数素数

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yangxin
on March 4, 2009, 2:15 p.m.
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yangxin
on March 4, 2009, 2:12 p.m.
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152.00 KB
yangxin
on March 4, 2009, 2:04 p.m.
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152.00 KB