I have proved that there is only 698896 in 6-digit number.

来源: jinjing 于 2010-10-12 20:56:19 [] [旧帖] [给我悄悄话] 阅读数 : (112 bytes)
本帖于 2010-10-22 17:24:19 时间, 由超管 论坛管理 编辑

there is no 4-digit number.

If we want to find next number,it at least is 8-digit number.n=121*m^2...m>300...

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