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The prime factors of 86 are 2 and 43
Numbers expressed using exponents are called powers. When writing a number expressed as an exponent, the number is called the base.
You can make it 4 to the 9th power and you will still get the same answer.
It means you do it in a different order - e.g: 6×72 = 6×49 = 294 (6×7)2 = 422 = 1764
40 = 23*5