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cho p la so nguyen to lon hon 3. Biet 8p+1 va p deu la so nguyen to (p lon hon 3).Hoi p+100 la so nguyen to hay hop so
1,cac so sau la so nguyen to hay hop so
a,E=1!+2!+3!+.............+100!
b,G=3.5.7.9-28
c,H=311141111
cho P va P+8 la 1 so nguyen to (P>3) hoi P+100 la so nguyen to hay hop so chi tiet
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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
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cho so nguyen to p va mot trong hai s 8p+1 va 8p-1 la so nguyen to ,so con lai la so nguyen to hay hop so?
Cho p va p + 8 deu la so nguyen to (p>3 ). hoi p =100 la so nguyen to hay hop so
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cho M=a^100+b^100+c^100+d^100 trong do a,b,c,d la cac so nguyen to khac 0 hoi M la so nguyen to hay hop so