m-f-h

"""
    k_plus_sigma_k_is_perfect.py
    edited and modified by MFH 
    forked from D.Radcliffe

Problem:
The number 10 has a special property. When 10 is added to the sum 
of its divisors, the result is 28, which is a perfect number.

    10 + sigma(10) = 10 + 1 + 2 + 5 + 10 = 28

m-f-h

""" isprime.py
    May / June 2022 by M. F. Hasler

SYNOPSIS: very simple implementation of basic Number Theory functions:
    isprime(n): return True or False according to whether n is prime or not
    nextprime(n, i=1): return the i-th prime > n (i.e., >= n + 1).
    prevprime(n, i=1): return the i-th prime < n or 0 if n < prime(n).
    primes(n=math.inf, start=2, end=math.inf): return a generator 
              producing at most n primes in [start, end). 
    isprimepower(n): return True if n is prime, or

m-f-h

// findNextPrime.cpp - return the next larger prime number
// (input taken from command line args or from stdin)

#include <iostream>
int findNextPrime(int n);   // given a number n, find the next larger prime number above n
bool isPrime(int n);        // given a number n, determine whether it is prime

int main(int argc, char**argv)
{
    int input;