=6 =65 =20 30=?=10 =12 =40 =28质数

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=6 =65 =20 30=?=10 =12 =40 =28质数
=6 =65 =20 30=?=10 =12 =40 =28
质数

=6 =65 =20 30=?=10 =12 =40 =28质数
1+5=3+3=6
5x13=65
3+17=20
30=1+29=7+23=11+19
3+7=10
23-11=12
3+37=40
5+23=28