A Blum integer is a semiprime—that is, the product of two distinct primes—whose factors have the form 
for some integer k. The number 21 is a Blum integer because its two prime factors, 3 and 7, have the form with 
and 
. The number 123 is a semiprime because it is 
, but it is not a Blum integer because 41 is not 3 more than a multiple of 4. The number 1463 is not a Blum integer: although its prime factors are distinct and each 3 more than a multiple of 4, there are three of them, not two.
for some integer k. The number 21 is a Blum integer because its two prime factors, 3 and 7, have the form with and . The number 123 is a semiprime because it is , but it is not a Blum integer because 41 is not 3 more than a multiple of 4. The number 1463 is not a Blum integer: although its prime factors are distinct and each 3 more than a multiple of 4, there are three of them, not two. Write a function to determine whether the numbers in a matrix are Blum integers.
Solution Stats
Solution Comments
Show comments
Loading...
Problem Recent Solvers10
Suggested Problems
-
3452 Solvers
-
Given an unsigned integer x, find the largest y by rearranging the bits in x
2078 Solvers
-
Generate a string like abbcccddddeeeee
276 Solvers
-
390 Solvers
-
Generate the sum of Squares of the given number
106 Solvers
More from this Author329
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
