Cody

# Problem 659. How long is the longest prime diagonal?

Solution 135353

Submitted on 5 Sep 2012
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### Test Suite

Test Status Code Input and Output
1   Fail
%% n = 4; d = 2; %p = isprime(spiral(n));imagesc(p) assert(isequal(prime_spiral(n),d))

```Error: Output argument "d" (and maybe others) not assigned during call to "/users/msssystem7/prime_spiral.m>prime_spiral". ```

2   Fail
%% n = 7; d = 4; assert(isequal(prime_spiral(n),d))

```Error: Output argument "d" (and maybe others) not assigned during call to "/users/msssystem7/prime_spiral.m>prime_spiral". ```

3   Fail
%% n = 13; d = 5; assert(isequal(prime_spiral(n),d))

```Error: Output argument "d" (and maybe others) not assigned during call to "/users/msssystem7/prime_spiral.m>prime_spiral". ```

4   Fail
%% n = 52; d = 6; assert(isequal(prime_spiral(n),d))

```Error: Output argument "d" (and maybe others) not assigned during call to "/users/msssystem7/prime_spiral.m>prime_spiral". ```

5   Fail
%% n = 81; d = 9; assert(isequal(prime_spiral(n),d))

```Error: Output argument "d" (and maybe others) not assigned during call to "/users/msssystem7/prime_spiral.m>prime_spiral". ```