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n(is a even number)=122
1,n= 13 + 109
2,n= 19 + 103
3,n= 43 + 79
4,n= 61 + 61
That is all!!!
4乘以2减1等于7;121不是素数。
n(is a even number)=1718
1,n= 19 + 1699
2,n= 61 + 1657
3,n= 97 + 1621
4,n= 109 + 1609
5,n= 139 + 1579
6,n= 151 + 1567
7,n= 229 + 1489
8,n= 271 + 1447
9,n= 337 + 1381
10,n= 397 + 1321
11,n= 421 + 1297
12,n= 439 + 1279
13,n= 487 + 1231
14,n= 547 + 1171
15,n= 601 + 1117
16,n= 631 + 1087
17,n= 709 + 1009
18,n= 727 + 991
19,n= 751 + 967
20,n= 811 + 907
21,n= 859 + 859
That is all!!!
21乘以2减1等于41,1717=17*101,不是素数。
n(is a even number)=992
1,n= 73 + 919
2,n= 109 + 883
3,n= 139 + 853
4,n= 163 + 829
5,n= 181 + 811
6,n= 223 + 769
7,n= 241 + 751
8,n= 283 + 709
9,n= 331 + 661
10,n= 349 + 643
11,n= 373 + 619
12,n= 379 + 613
13,n= 421 + 571
That is all!!!
13乘以2等于26,,991是素数,26+2=28。
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