02/23/2009, 11:48 AM

guys how can i compute teh last digit of a number , resulting from tetration without computing the real number..

for example ...5||2 = 2^65536...how can i get the last digit of that number without computing it..teh last 8 digits for example ?

for example ...5||2 = 2^65536...how can i get the last digit of that number without computing it..teh last 8 digits for example ?