tim so nguyen p sao cho p^2=1 va p^4+1 cung la so nguyen to. tra loi so nguyen to thoa man la p=
Tim tat ca so nguyen sao cho p + 2 va p + 4 cung la so nguyen to
Tim 4 so nguyen to lien tiep sao cho tong cua 4 so nguyen to do cung la 1 so nguyen to
tim tat ca cac so nguyen to p va q sao cho : 7p+q va pq+11 cung la so nguyen to
tim so nguyen to p sao cho:
a,p+2 va p+4 la so nguyen to
b,p+2 va p+6 va p+8 la so nguyen to
c,p+10 va p+14 la so nguyen to
tim so tu nhien n sao cho 7n+13 va 2n+4 la nguyen to cung nhau
Tim tat ca cac so nguyen to p va q sao cho so 7p+q va pq+11 cung la cac so nguyen to
Tim tat ca cac so nguyen to p sao cho p+2 va p+28 cung la so nguyen to
tim so nguyen to p sao cho p + 10 va p + 14 cung la nguyen to . ket qua p =