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+//Chapter 04:Number Theory and Cryptography
+
+clc;
+clear all;
+
+function primefactors(n)
+ while modulo(n,2) == 0 //To print all the 2s that divide input
+ disp('2')
+ n=n/2
+ end
+ for i=3:2:sqrt(n)//increment by 2 so as to obtain odd numbers only
+ while modulo(n,i)==0
+ disp(i)
+ n=n/i
+ end
+ end
+if(n>2) then //to check for prime number
+ disp(n)
+ end
+endfunction
+
+n1=100
+n2=641
+n3=999
+n4=1024
+mprintf("Prime factors of %d are:",n1)
+disp(primefactors(n1))
+mprintf("\nPrime factors of %d are:",n2)
+disp(primefactors(n2))
+mprintf("\nPrime factors of %d are:",n3)
+disp(primefactors(n3))
+mprintf("\nPrime factors of %d are:",n4)
+disp(primefactors(n4))
+