Given an integer x which contains d digits, find the value of (minimum) n (n > 1) such that the last d digits of x^n is equal to x. If the last d digits will never equal x, return inf.
Example 1:
- x = 2; (therefore d = 1)
- 2^2 = 4, 2^3 = 8, 2^4 = 16, 2^5 = 32
- n = 5;
Example 2:
- x = 10; (therefore d = 2)
- 10^2 = 100, 10^3 = 1000, etc
- n = inf;
Solution Stats
Problem Comments
3 Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers86
Suggested Problems
-
3433 Solvers
-
"Low : High - Low : High - Turn around " -- Create a subindices vector
583 Solvers
-
Flag largest magnitude swings as they occur
690 Solvers
-
Golomb's self-describing sequence (based on Euler 341)
182 Solvers
-
Convert given decimal number to binary number.
2281 Solvers
More from this Author4
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
is it correct for 35197? Im getting 5001 instead of inf.
I also get 5001.
10016 and 10081 have another valid answer: 1251 (besides 626). The problem should accept them or request the minimum exponent.