Problem 44384. Find the nearest prime number

Solution 2028243

Submitted on 19 Nov 2019 at 21:26

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Test	Status	Code Input and Output
1	Fail	x = 0; y_correct = 2; assert(isequal(nearestprime(x),y_correct)) d = 0 Error using isprime (line 19) All entries of X must be nonnegative integers. Error in nearestprime (line 3) while ~isprime(x-d) && ~isprime(x+d) Error in Test1 (line 3) assert(isequal(nearestprime(x),y_correct))
2	Fail	x = 5; y_correct = 5; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 5 5 y = 5 5 Assertion failed.
3	Pass	x = 100; y_correct = 101; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 99 101 y = 101
4	Pass	x = 500; y_correct = 499; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 499 501 y = 499
5	Fail	x = 911; y_correct = 911; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 911 911 y = 911 911 Assertion failed.
6	Pass	x = 2500; y_correct = 2503; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 2497 2503 y = 2503
7	Pass	x = 8000; y_correct = 7993; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 7993 8007 y = 7993
8	Pass	x = 100000; y_correct = 100003; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 99997 100003 y = 100003
9	Pass	x = 1300000; y_correct = 1299989; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 1299989 1300011 y = 1299989
10	Pass	x = 179424710; y_correct = 179424719; assert(isequal(nearestprime(x),y_correct)) d = 0 y = 179424701 179424719 y = 179424719