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 nguyen to p sao cho p+8 va p+10 la so nguyen to
tim so nguyen to p sao cho p+8 va p+14 la so nguyen to
tim so nguyen to p sao cho p+4 va p+8 la cac so nguyen to
1) Tim so nguyen to P de co:
a) P+10 va P+14 deu la so nguyen to
b) P+2 ;P+6 va P+8 deu la so nguyen to
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 cac so nguyen to P sao cho
a. P+10;P+20 la cac so nguyen to
b. P+2;P+6;P+8;P+14 la cac so nguyen to
tim so nguyen to p sao cho p+2 va p+4 la so nguyen to
tim so nguyen to p sao cho p+2 va p+4 deu la so nguyen to ???