Happy #PerfectNumbersDay (if it isn’t a day already)!

#PerfectNumbers are integers where the sum of its divisors, except itself, equal itself. The first two are 6 and 28 because 6 = 1+2+3 and 28 = 1+2+4+7+14.

Perfect numbers are closely related to #MersennePrimes (2^p-1), because if 2^p-1 is prime then (2^(p-1))*(2^p-1) is perfect. The largest known perfect number is (2^136279280)*(2^136279841-1), after 2^136279841-1 was found to be prime last year.

https://en.wikipedia.org/wiki/List_of_Mersenne_primes_and_perfect_numbers

#Math #Mathematics