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There is a formula, which uses Mersenne primes. If you don't know what that is, then you'll find it somewhere on the internet. The formula is this: 2n-1 x (2n-1) This will only work if the bit inside the bracket is a Mersenne prime. =)

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Q: How do you calculate a perfect number?
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Related questions

Is 2934 a square?

Try it out! For example, you can use a calculator to calculate the number's square root. If you get a whole number - no decimals - then the number is a perfect square.


What number should be added to a number to get a perfect square?

Because numbers are infinite, there is an infinite number of answers. e.g. What number should be added to 2 to make a perfect square? 2+2=4 (a perfect square) 2+7=9 (a perfect square) 2+14=16 (a perfect square) 2+23=25 (a perfect square) etc... Did you have a specific number in mind.


Is 8128 a perfect number?

There is a formula to calculate even perfect numbers, 2p-1(2p - 1) where p is a prime number. When p = 7 then 26(27 - 1) = 64 x 127 = 8128 So 8128 is the 4th perfect number. (The other three occur when p = 2, 3 and 5)


What is the sum of the first perfect number and the second perfect number?

The sum of the 1st perfect number and 2nd perfect number is. . . 34!


What is it called when a number has a whole number square root?

Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".


Can a perfect number be odd?

If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.


What is the largest 3-digit square number?

The largest 3-digit number - not itself a perfect square - is 999. Calculate its square root, round the answer down, then square the answer again.


What is the third perfect number?

496 is the third perfect number and 8128 is the fourth perfect number.


What number is both a square number and a cube number between 1 and 25?

There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.


Is 28 a perfect number?

Yes it is. 6 is the first perfect number, 28 is the second perfect number.


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