Nombres presque-premiers dans de petits intervalles M. LABORDE Seminaire de Théorie des Nombres de Bordeaux
P 2 in short intervals Henryk Iwaniec; M. Laborde — 1981 Annales de l'institut Fourier For any sufficiently large real number x , the interval [ x , x + x 0 , 45 ] contains at least one integer having at most two prime factors .