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Problem 659. How long is the longest prime diagonal?

Solution 422653

Submitted on 26 Mar 2014 by Ashutosh datar
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Test Suite

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

d = 2

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

d = 4

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

d = 5

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

d = 6

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

d = 9

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