say something.

來源: 於 2011-04-04 21:17:14 [舊帖] [給我悄悄話] 本文已被閱讀：次

...n+1=5*2t.the n's last number is 9...try only 7^2*31 ok.This kind Q,most cases no solution,but we can us s to find new Q, let n+s=m(....).