Cody

Problem 45994. Investigate the frequency of last digits of prime numbers

Solution 3764623

Submitted on 21 Nov 2020 by David Hill
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Test Suite

Test Status Code Input and Output
1   Pass
n = 100; f_correct = [0 0.6000 0.4000 0; 0 0 0.3333 0.6667; 0.6667 0.1667 0 0.1667; 0.4000 0.4000 0.2000 0]; assert(isequal(round(primeLastDigit(n),4),f_correct))

2   Pass
n = 149; f_correct = [0 0.5714 0.4286 0; 0 0 0.5000 0.5000; 0.5556 0.1111 0 0.3333; 0.3750 0.3750 0.1250 0.1250]; assert(isequal(round(primeLastDigit(n),4),f_correct))

3   Pass
n = 1e4; f_correct = [0.1340 0.3399 0.4020 0.1242; 0.1715 0.1036 0.3236 0.4013; 0.2922 0.2890 0.0974 0.3214; 0.4026 0.2772 0.1815 0.1386]; assert(isequal(round(primeLastDigit(n),4),f_correct))

4   Pass
n = 1e6; f_correct = [0.1638 0.3211 0.3339 0.1812; 0.2231 0.1430 0.2959 0.3380; 0.2583 0.2774 0.1464 0.3178; 0.3546 0.2609 0.2234 0.1610]; assert(isequal(round(primeLastDigit(n),4),f_correct))

5   Pass
n = 1e8; f_correct = [0.1770 0.3039 0.3103 0.2087; 0.2364 0.1667 0.2869 0.3101; 0.2558 0.2732 0.1668 0.3042; 0.3308 0.2562 0.2362 0.1768]; assert(isequal(round(primeLastDigit(n),4),f_correct))

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