Sorry,I'm toally wrong at beginnig,the difference of two numbers,can't get any one can divided by 2, I do question by head,...and got wrong answer.I only get x=9m+1,y=3t,...and try ...you can check all in web. In 196?, Hua luogen told us,you answer Q the faster the better even not right,...so,...I gess maybe the 9781 is too big for computer.Someone got result or not, I don't know.Number theory is interesting but hard.Good luck.
回复:回复:Your Ex,5should be 5^2m,3 ...3^2n...,We get |9781-Z^2|=1,
回答: 回复:Your Ex,5should be 5^2m,3 ...3^2n...,We get |9781-Z^2|=1,
由 calligraphy
于 2011-01-27 11:26:44