Harper.c

Harper.c is a number entered in the Bignum Bakeoff contest.http://djm.cc/bignum-results.txt, by Russel Harperrharper1661@rogers.com.
The upper bound is E(2**(2**(10**8+2))) and the higher bound E(2**(2**(10**8+3))). Here x**y denotes x to the power of y and E(x) is 2 tetrated to the xth.
==Program==
The C program is the following:
 #define I int
 #define w while
 #define r return
 I l(I x){I y=x;w(y--)x*=x;r x;}
 I k(I x,I y){w(y--)x*=k(x,y)*l(x);r x;}
 I j(I x,I y){w(y--)x*=j(x,y)*k(x,y);r x;}
 I i(I x,I y){w(y--)x*=i(x,y)*j(x,y);r x;}
 I h(I x,I y){w(y--)x*=h(x,y)*i(x,y);r x;}
 I g(I x,I y){w(y--)x*=g(x,y)*h(x,y);r x;}
 I f(I x,I y){w(y--)x*=f(x,y)*g(x,y);r x;}
 I e(I x,I y){w(y--)x*=e(x,y)*f(x,y);r x;}
 I d(I x,I y){w(y--)x*=d(x,y)*e(x,y);r x;}
 I c(I x,I y){w(y--)x*=c(x,y)*d(x,y);r x;}
 I b(I x,I y){w(y--)x*=b(x,y)*c(x,y);r x;}
 I a(I x,I y){w(y--)x*=a(x,y)*b(x,y);r x;}
 I main(void){r a(9<<99999999,9<<99999999);}
In practice, running the program would result in an integer overflow, considering that the int data type in C can represent numbers with up to 2 or 4 bytes depending on the platform.https://www.tutorialspoint.com/cprogramming/c_data_types.htm However, if there was no integer overflows, the program would output the Harper.c number.
== References ==
== See also ==
Category:Numbers
Category:Tetration level
Category:Bignum Bakeoff
Category:Computers