Tìm số nguyên tố biết số đó bằng tổng của 2 số nguyên tố và bằng hiệu của 2 số nguyên tố
1. Tim so nguyen to biet so do bang tong cua 2 so nguyen to va bang hieu cua 2 so nguyen to
2. tim 2 so tu nhien sao cho tong va tich cua chung la so nguyen to
3. Tim tat ca cac so nguyen to p sao cho pp + 1994 la 1 so nguyen to
4. Tim cac so tu nhien p sao cho:
1)p, p + 2, p + 4 la cac so nguyen to
2)p, p + 2, p + 10 la cac so nguyen to
3)p, p + 10, p + 20 la cac so nguyen to
4)p, p + 2, p + 6, p + 8, p+ 12, p + 14 la cac so nguyen to
5)p, p + 2, p + 6, p + 8, p + 14 la cac so nguyen to
6)p + 1, p + 3, p + 7, p + 9, p + 13, p + 15 la cac so nguyen to
7)p, p + 10, p + 14 la cac so nguyen to
8)p, p+ 4, p + 14 la cac so nguyen to
9)p, 2p + 1, 4p + 1 la cac so nguyen to
10)p, 8pp + 1 la cac so nguyen to
5. Tim tat ca cac cap so nguyen to (p,q) sao cho pp - 2qq = 1