When m is the unit number 1 and 1, its power result is unchanged

"2" because 4 * 4 = 164 * 4 = 64, that is to say, the unit number 4*6 of 4*16 is 4, from which it can be deduced that the last number of 2114 to the 2115 power is 4; 8*8=64 8*4=32 8*2=16 8*6=48 8*8=64, it can be concluded that the square digit of 2118 is 4, the fourth digit of 2118 is 8, and the fifth digit of 2118 is 4, so the 2117 digit of 2118 is 6,,, and the same 2117 digit.