On average, there are as many prime numbers for which the sum of decimal digits is even as prime numbers for which it is odd. This hypothesis, first made in 1968, has recently been proven by ...

Leonardo Pisano (1170–1250), or Fibonacci, is perhaps best known for a remarkable sequence of numbers that arises out of a problem that involves breeding rabbits. The problem is contained in the third ...

This is a preview. Log in through your library . Abstract We prove that every odd number N greater than 1 can be expressed as the sum of at most five primes, improving the result of Ramaré that every ...