diff --git a/1653_numcutup/Readme.md b/1653_numcutup/Readme.md
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+# 整数拆段
+
+[问题描述]
+
+教学案例，必须使用函数完成求解！
+
+　　将一个长度小于15位的数字串拆成2段，使其和为最小的素数。  
+　　例如数字串‘13304’，拆的方法有:  
+　　　1 + 3304 = 3305  
+　　　13 + 304 = 317  
+　　　133 + 04 = 137  
+　　　1330 + 4 = 1334  
+　　从上面可看出，和为素数的有：317 与137，最小的是137 
+
+[输入格式]  
+　　一个长度小于15的数字串。
+
+[输出格式]  
+　　最小的和为素数的数，若无素数则输出 -1。
+
+[输入样例]  
+13304
+
+[输出样例]  
+137
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diff --git a/1653_numcutup/doc/Readme.md b/1653_numcutup/doc/Readme.md
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+# 标题
+
+* 内容
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diff --git a/1653_numcutup/main.cpp b/1653_numcutup/main.cpp
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+++ b/1653_numcutup/main.cpp
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+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello Easy C++ project!" << std::endl;
+}
diff --git a/1653_numcutup/main.exe b/1653_numcutup/main.exe
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Binary files /dev/null and b/1653_numcutup/main.exe differ
diff --git a/1653_numcutup/numcutup.cpp b/1653_numcutup/numcutup.cpp
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+++ b/1653_numcutup/numcutup.cpp
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+#include<iostream>
+using namespace std;
+bool pan(long long n){
+    if(n<2){
+        return 0;
+    }
+    for(int i=2;i*i<=n;i++){
+        if(n%i==0){
+            return 0;
+        }
+    }
+    return 1;
+}
+int main(){
+    long long n,a=10,b,ans=1000000000000000;
+    cin>>n;
+    for(int i=10;a>=10;i*=10){
+        a=n/i;
+        b=n%i;
+        if(a+b<ans&&pan(a+b)==1){
+            ans=a+b;
+        }
+    }
+    if(ans==1000000000000000){
+        ans=-1;
+    }
+    cout<<ans;
+}
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diff --git a/1653_numcutup/numcutup.exe b/1653_numcutup/numcutup.exe
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diff --git a/1653_numcutup/test/in.txt b/1653_numcutup/test/in.txt
new file mode 100644
index 0000000..e24826d
--- /dev/null
+++ b/1653_numcutup/test/in.txt
@@ -0,0 +1 @@
+13304
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diff --git a/1653_numcutup/test/in2.txt b/1653_numcutup/test/in2.txt
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+++ b/1653_numcutup/test/in2.txt
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+33
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diff --git a/1653_numcutup/test/out.txt b/1653_numcutup/test/out.txt
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+++ b/1653_numcutup/test/out.txt
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+## z:\Chao\src\1653_numcutup\test\in.txt 
+2020/03/27 周五 17:59:38.77 
+137
+-----------------------------------------------
+Process exited after 160 ms with return value 0
+
+## z:\Chao\src\1653_numcutup\test\in2.txt 
+2020/03/27 周五 17:59:38.77 
+-1
+-----------------------------------------------
+Process exited after 90 ms with return value 0
+