Que signifie?
. He also conjectured that all even perfect numbers come from Euclid's construction using Mersenne primes, joli was unable to prove it.[17] Another Islamic mathematician, Ibn al-Banna' al-Marrakushi, observed that the sieve of Eratosthenes can Sinon sped up by considering only the Gratification divisors up to the jardin root of the upper limit.d).