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tim so tu nhien n de 4n+n^2 la so nguyen to
hai so 2^n - 1 va 2^n +1 co the dong thoi la so nguyen to hay dong thoi la hop so duoc khong
tim so tu nhien n de 2^3n-2 la so nguyen to
chung minh 2^n-1va 2^n+1 n thuoc stn.khong the dong thoi la 2 so nguyen to n>1
tim so tu nhien n de 23n-2 la so nguyen to
tim so tu nhien n de (n+3)(n+1) la so nguyen to
Tim so tu nhien n de (n+3)(n+1) la so nguyen to
tim so tu nhien n de 23n-2 la so nguyen to
tim so tu nhien n de 2n+1 va 7n+2 la hai so nguyen to cung nhau
