tap hop cac so nguyen to p de p+10 va p+14 deu la so nguyen to
Bai 1:tim so nguyen P biet P+2va P+4 deu la nguyen to
bai 2: tong 2^100×7×11+81^3 la nguen to hay hop so ( giai thich)
Bai 3: tim so nguyen to P de P +2,p+6,P+8 deu la cac 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 n de :2^n-1 va 2^+1 deu la so nguyen to
tim so nguyen to p biet rang:
a) p+94 , p+1994 la so nguyen to
b) p^2+4 va p^2-4 deu la so nguyen to
tim so nguyen to p sao cho p+2 va p+4 deu la so nguyen to ???
tim so nguyen to p de p+10, p+14 deu la so nguyen to
tim so nguyen to P sao cho P+94 va P+1994 deu la so nguyen to
tim so nguyen p va q sao cho 7p+q va pq+11 deu la so nguyen to